I have a 69 with a 752 horse power Shafiroff aluminum 582. I have done the searches here, and havent read about anybody using the Jerico transmission. I have ben on there web sight, and like what i see. I would just like to here if thay are user friendly on the street and the drag strip. Any help or direction would be greatly apreaciated.
marks412
Nice to see another manual trans 500+ cid guy here. The Jerico should do well, the faceplated trans needs to be finessed or it will clunk but it does not harm anything. 752 seems a little light for a 582 you got it tuned mild for the street? I'll be looking at a Liberty 5 spd for my next bullet. I do not intend any disrespect on the hp numbers it must be a torque monster there are several street cars here making close to that with smaller cubes . Rowdy's 540 is a daily driver and is putting out 760 or so. Glad to have you here. Aloha
http://www.ultrastreet.net/engines/582_bigdawg.asp
If you scroll down you will see they offer serveral versions of thier engines. Extended cruising,Hot Hyd. Roller, Saturday night special, and a E85 version.
If you scroll down you will see they offer serveral versions of thier engines. Extended cruising,Hot Hyd. Roller, Saturday night special, and a E85 version.
Jerico is a great tranny. Not to street friendly though. The straight cut gears are hard to shift at lower rpms.
I have a Jerico 5-speed that I will be putting in the '64, behind 427" BBC for NHRA Super Stock. It is an awesome transmission, but I don't know of anyone using one on the street. The trans is designed for full throttle shifts and I think down-shifting would be a chore, if not impossible. The Liberty 5-speed is nice too, but they only offer it in clutchless configuration, which is not allowed in NHRA S/S classes.
Also, the Liberty 5-speed will not fit in a Chevelle without modifying the floor pan fairly extensively.
Also, the Liberty 5-speed will not fit in a Chevelle without modifying the floor pan fairly extensively.
The 582 is the hot hydrulic roller with the little 950hp carb. It works great. A bit pricey with Brodix block, but weight is always a factor. I already had the full MSD ignition, so I sent the distributer for them to dyno with. Verry cool experience with the guys at Shafiroff.
And yes, A stick shift car is the only way to go!!!!
Thanks guys
And yes, A stick shift car is the only way to go!!!!
Thanks guys
That is a nice bullet Mark. Bill there is a member here that is using a faceplated trans on the street other than finessing the shifts and the occasional clunk he is liking it. I already have a Richmond 5 spd in my car. Liberety says there's is clutch assisted I did not see the 5 spd on Jerico's site. I'll have to call them to see if the offer one. When my motor is done bad manners have too be tolerated, or keep spares on hand....
with spare parts in handI run a g-force g-101 4 speed behind my 548" pump gas bbc,752 hp at 6400 and 670 ft lbs at 5100
A sintered iron adjustable clutch is what you need to use for parts longivity,i had Tim hyatt set one up for me,works for street and strip
The jerico with the road race sliders will be the same as the g-force design wise
I drive mine 126 mile round trip on track days ,which includes plenty of downshifting
the trick is to slow WAY down before you attempt to downshift,it's all about matching speeds,if you attemt to downshift too soon you will have a major clunk.
I actually found a clutch setting that works for street and strip just fine,and that is with alot of hill climbing,one less thing to do at the track!!
The g-force is a much stronger trans.,and is better with high torque/heavy cars and is not as sensitive to clutch pressures,i found this out through alot of research with superstock racers who have used both.
the magnesium cased jerico is not recommended for street use as it gets brittle from the heat cycles,this info is straight from jerico,they do make an optional alum. case.
A sintered iron adjustable clutch is what you need to use for parts longivity,i had Tim hyatt set one up for me,works for street and strip
The jerico with the road race sliders will be the same as the g-force design wise
I drive mine 126 mile round trip on track days ,which includes plenty of downshifting
the trick is to slow WAY down before you attempt to downshift,it's all about matching speeds,if you attemt to downshift too soon you will have a major clunk.
I actually found a clutch setting that works for street and strip just fine,and that is with alot of hill climbing,one less thing to do at the track!!
The g-force is a much stronger trans.,and is better with high torque/heavy cars and is not as sensitive to clutch pressures,i found this out through alot of research with superstock racers who have used both.
the magnesium cased jerico is not recommended for street use as it gets brittle from the heat cycles,this info is straight from jerico,they do make an optional alum. case.
I ran a Jerico four speed on the street for three seasons in a full weight Monte Carlo (4400 pounds) that I built a 557 CID pump gas BBC for back in the late nineties....with ET street purposely aired up, the car ran 131-132 traps and low-mid tens spinning tires with a crappy 60 foot (so as not to grenade the stock 10 bolt at the time).
I loved that gear box and besides the "clunk" when you slid it into first gear (like a motorcycle trans), driving it around wasn't an issue if you spaced the gears right with clutch timing and throttle. Within a few weeks you can drive it seamlessly but can never avoid the clunk in first (no big deal). I also opted for the road race version otherwise it would fall out of gear of you let of the throttle (the drag version allows you to grab gears at WOT powershifts but sucks to drive on the street).
Honestly even the road race version shifts extremely fast because all you need to do is lift slightly to get it out of the gear your in and you cant miss the next one no matter whether your clutch is depressed a little or none at all.....some guys run an ignition interrupt or purposely hit the rev limiter briefly and don't even use the clutch....that slight interruption in power allows you to pull it out of the current gear and with a dog ring style trans set-up you cant miss the next one.
Great strong box for an aggressive street car and the gear whine from the straight cut gears will have all your dyed in the wool gear head buddies envious. My friends would hear me coming down the street from a block away and hear the faint whine from my trans before the exhaust note which was facing the opposite direction....to say this trans is "manly" is certainly an understatement....LOL
I would actually consider selling mine which has been sitting in storage since I arrived in CA....I dont see my Monte Carlo seeing the light of day anytime soon and due to that fact have been kicking around selling that and some other components just gathering dust. Anyway....PM me if any of you are interested but it looks new and is in perfect shape so Im not giving it away.
Its a great box if you don't mind a bit more noise and have a pretty aggressive street toy....I wouldn't recommend it for a daily driver type of ride though....IMO its unique attributes may be too much of a good thing and a perfectly smooth, quiet synchronized box would likely be a better alternative.
Hope this helps....
-Tony
I loved that gear box and besides the "clunk" when you slid it into first gear (like a motorcycle trans), driving it around wasn't an issue if you spaced the gears right with clutch timing and throttle. Within a few weeks you can drive it seamlessly but can never avoid the clunk in first (no big deal). I also opted for the road race version otherwise it would fall out of gear of you let of the throttle (the drag version allows you to grab gears at WOT powershifts but sucks to drive on the street).
Honestly even the road race version shifts extremely fast because all you need to do is lift slightly to get it out of the gear your in and you cant miss the next one no matter whether your clutch is depressed a little or none at all.....some guys run an ignition interrupt or purposely hit the rev limiter briefly and don't even use the clutch....that slight interruption in power allows you to pull it out of the current gear and with a dog ring style trans set-up you cant miss the next one.
Great strong box for an aggressive street car and the gear whine from the straight cut gears will have all your dyed in the wool gear head buddies envious. My friends would hear me coming down the street from a block away and hear the faint whine from my trans before the exhaust note which was facing the opposite direction....to say this trans is "manly" is certainly an understatement....LOL
I would actually consider selling mine which has been sitting in storage since I arrived in CA....I dont see my Monte Carlo seeing the light of day anytime soon and due to that fact have been kicking around selling that and some other components just gathering dust. Anyway....PM me if any of you are interested but it looks new and is in perfect shape so Im not giving it away.
Its a great box if you don't mind a bit more noise and have a pretty aggressive street toy....I wouldn't recommend it for a daily driver type of ride though....IMO its unique attributes may be too much of a good thing and a perfectly smooth, quiet synchronized box would likely be a better alternative.
Hope this helps....
-Tony
Check out this site http://www.umtrnorth.com/forums/
excellent resource for manual trans racrs ........I am sure lots of Jerico users there .....
Faceplated or dog ring trans is awesome for upshifting/ powershifting never miss a gear ....occaisional street use you can tolerate the downshift but would be a real pain in traffic IMO
excellent resource for manual trans racrs ........I am sure lots of Jerico users there .....
Faceplated or dog ring trans is awesome for upshifting/ powershifting never miss a gear ....occaisional street use you can tolerate the downshift but would be a real pain in traffic IMO
My uncle runs a 4-speed Jerico in his '55 behind a 550-600hp small block. He absolutely loves it on both the street and the strip. It's a little rough around the edges for street driving but he doesn't mind. Just takes a little getting used to. My Dad uses A Lenco St1200 4-spd in his 1100hp '55 for street and strip and that's a blast as well.
Here's a couple vids of my uncles in action.
Here's a couple vids of my uncles in action.
We run a G force GF-5R 5 speed in my dad's '70 - very similar in concept to the jerico's. It's 99.9% street car - might make a trip or two to the track on a test and tune night. We put about 1000 miles on it a year. Motor is a mike lewis pump gas 555ci, making 790hp. We've only got about 400 miles on the tranny since we put it in, so we're still getting used to it. From the day I drove it the first time though, I loved it. As mentioned, the upshifts are unbelievably smooth and FAST as the rpms get higher. Downshifts are not BAD, they just take a tiny bit more time and effort than they do with a regular syncro'd trans - you just don't downshift everytime you come to a stop sign, that's really the only thing I do differently now. But if I want to downshift, a little blip of the throttle and it goes into gear, sometimes with a clunk. I love it though, I feel like I'm driving a stock car on the street. The gear whine is definitely noticeable, in a good way. Put it in 5th gear, and it's dead silent though, so cruising at highway speed is no issue. We know we won't break it, and that's why we bought it - it's good to 1300hp? plus, if I remember right. We did have some floorboard work to do to get it to fit with the external linkage rods and all. The jericos are similar concept/design I think. We looked at them too, but went with the G force after hearing more about them from friends/fellow hot rodders/drag racers. Also, G Force's customer service is TOP NOTCH. Those guys really know their stuff and would bend over backwards for you. They also helped us setup the gear ratios so that we could run a long rear end gear (a 3.00:1 ratio) to make 5th gear more like an overdrive, even though 5th gear is actually 1:1. I think they put a 3.42 or 3.47 1st gear in it to compensate. I can't personally comment on Jerico's customer service, as I never actually talked to them - but I heard that they are good too!
You have to want to drive this type of trans - if you're expecting a quiet, easy going transmission for slow speed driving, you will be disappointed. If you want a monster of a trans that will take any amt of power and abuse, and give your car a bit more of an attitude on the street, then look at the jerico's/g-force's. Most people told us not to get the 5R trans - that it would be too rough on the street. I can't say I agree with any of them at this point! My personal opinion only!
You have to want to drive this type of trans - if you're expecting a quiet, easy going transmission for slow speed driving, you will be disappointed. If you want a monster of a trans that will take any amt of power and abuse, and give your car a bit more of an attitude on the street, then look at the jerico's/g-force's. Most people told us not to get the 5R trans - that it would be too rough on the street. I can't say I agree with any of them at this point! My personal opinion only!
Ryfrat,the g force gf-5r can have the 26 splined input and everything will fit nothing exotic
on the yoke it is 32 spline gm,but you will have to get the yoke from g force or mark williams as it is hardened for use with the needle bearings in the tailhousing
no bushing is used in the tails of these transmissions
for what you can sell that clutch for used,would come real close to getting a single sintered adjustable,your driveline will thank you.
on the yoke it is 32 spline gm,but you will have to get the yoke from g force or mark williams as it is hardened for use with the needle bearings in the tailhousing
no bushing is used in the tails of these transmissions
for what you can sell that clutch for used,would come real close to getting a single sintered adjustable,your driveline will thank you.
And you thought I was kidding about the G-Force GF5R!! I've had one in my Vette for a long time now and love it. As mentioned their service is incredible.
You can get several input shafts for them but most use the T-400/Super T-10 output.
The trick to really using any stick trans is the clutch. The dual disc Mcleods work, but they *hit* awful hard. I ran one for a while in mine, but when I went to the Soft Lok it was like a whole new car. Much smoother and consistent...and bound to be easier on parts. The dual disc ones are real picky about clutch travel and release to get the center plate not too drag too much..especially as Tony mentioned like at a red llight. A non synchro trans and a slightly dragging center plate in a dual disc clutch is no fun to get into gear.
There was a good deal on a GF5R on racingjunk last week.
JIM
You can get several input shafts for them but most use the T-400/Super T-10 output.
The trick to really using any stick trans is the clutch. The dual disc Mcleods work, but they *hit* awful hard. I ran one for a while in mine, but when I went to the Soft Lok it was like a whole new car. Much smoother and consistent...and bound to be easier on parts. The dual disc ones are real picky about clutch travel and release to get the center plate not too drag too much..especially as Tony mentioned like at a red llight. A non synchro trans and a slightly dragging center plate in a dual disc clutch is no fun to get into gear.
There was a good deal on a GF5R on racingjunk last week.
JIM
Another GF-5R fan here :thumbsup:
http://www.chevelles.com/forums/showthread.php?p=1560715&highlight=transmission#post1560715
http://www.chevelles.com/forums/showthread.php?p=1560715&highlight=transmission#post1560715
For pricing comparisons, I paid $2500 for a Tex Racing Jerico 4spd. They sell nascar trans, run for 1 weekend, then inspected, repaired if necessary, and also included the shifter.
Jerry
Jerry
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