392566 -
i think thats the number you need. the big print one. there should be a zero at the end (after the 2nd 6). it is the same as mine...
which would be a 68-70 m20,m21,m22 case
P0524A
P-Muncie 4spd
0-is the year 1970
5-im guessing its the month, which is May. (most of them should have a letter for the 3rd digit, which would represent the month, like A for Jan. B for Feb, and so on).
24- 24th day of the month
A-m20 2.52:1 first gear, wide ratio
so all in all, its an M20 wide ration tranny, built on May 24th, 1970
Wide ratio vs close ratio relates to the spacing of the gears.
What that actually means in regards to driving is that there is not as much change in engine rpm between gears with a close ratio as there is with a wide ratio.
Generally speaking, the wide ratio is the more compatable tranny for a street dirven car that has a fairly high geared rearend, such as a 3.08, 3.31, 3.55. The close ratio is more compatable with a performance geared rearend such as a 3.70, 4.10, 4.56.
Tom,
Great reading you input, what make it compatible? Gas mileage or quick off the line starts or just cruising down the highway.
Thanks, Greg
1970 and 65 Chevelle "newbie"
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.
Related Threads
?
?
?
?
?
Team Chevelle
5.1M posts
115.9K members
Since 1998
A forum community dedicated to Chevrolet Chevelle owners and enthusiasts. Come join the discussion about restorations, builds, performance, modifications, classifieds, troubleshooting, maintenance, and more!