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Discussion Starter · #1 ·
I just finished the engine build last week, so I have been driving around breaking the engine in for a few days now. I noticed that around town the trans temp gets up to almost 230 degrees. Is this too hot? I am running a 3000 RPM stall with crappy 2.73 rearend gears. I know this is slipping the convertor and generating heat around town. Is this why it is running hot? When I put the 4.11's in should that help?

(Sorry about all the questions, I just don't want toget the tranny too hot)

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Mark "THE DUDE" Skoch
1971 Malibu
"If you ever reach total enlightenment while drinking beer, I bet it makes beer shoot out your nose."
THE DUDEMOBILE

[This message has been edited by THE DUDE (edited 08-17-2001).]
 

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I don't think 230 would be a problem and yes 4.11's will help. You can "smell" the fluid and see if its been too hot. You'll know the smell, like its cooked electrical wires, similar smell. It will also darken when overheated. I wouldn't think you will hurt it unless you hold it against the stall and abuse it.
 

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230 sounds pretty hot. I run a 2800 stall lockup converter in my 200-4R with 3.55 rear gears. Trans temp stays steady at 150-165 on long, open highway runs with the converter locked up. If I do stop and go city driving in 90+ degree heat for 10-15 miles, the temp will occasionally go as high as 200, but generally stays around 165-180. I think you need to limit your driving until you get different rear gears. Are you running a cooler?

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Mike Newby

69 Chevelle 355/TH200-4R
97 Grand Prix GTP
64 Chevy C10 Pickup
79 Suzuki GS550
 

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170 to 190 is ideal. Every 20 degrees hotter will cut the life expectancy of the trans in half.

If a trans is good for 200,000 miles at 170 degrees, it'll go 100,000 at 190, 50,000 miles at 210, 25,000 at 230, 12,500 miles at 250, etc.

Yep, 230 is too hot.
 

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Never seen temps that hot. Mine gets up to 185 in worst cases.

your coolant lines could be blocked. you can take one off and turn over the motor (don't let it run) and stuf should shoot out. believe me it will SHOOT out.

Run an exterior cooler. mine is just the two row long ~20" jobber, only 3" tall. up in the top of the radiator, front.

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71' 3880# with me. Big Block 402, Merlin oval heads, 10.2:1CR, TH400, 3.73 posi,
BEST 1/8th: 8.252 @ 84.56mph (1.855 sixty foot)
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