4 OR 5 speed

[markjohnson]

Wow, thanks for the sound bites. It took all of my will power to set the phone down and not order one of those new M22's just now! Can you get any more American than that gear noise? I actually want that on CD to listen to while I drive my Honda.

[COPO427]

I like the M20 ratio better than the M21/M22 ratio so I'm going to order M22W. The M22W has the 2.56:1 1st gear.

See http://www.autogear.net/m22ratios.htm

Year 1966-1974 M20 Ratio: 2.52 / 1.88 / 1.46 / 1.00
Year 1963-1974 M21 Ratio: 2.20 / 1.64 / 1.28 / 1.00
Year 1967-1974 M22 Ratio: 2.20 / 1.64 / 1.28 / 1.00

[Chris_69_SS]

You know, It has been so long since I had a muncie in my Chevelle that listening to your clip convinced me to go with the M22...SWEET! I currently have 4.10s so I can just leave the diff alone.

Thanks,

[tom406]

No right or wrong answers here, obviously. I personally hate driving cars without overdrive that have steeper gears than 3.50 or so. I had 4.11's in a Mustang a while back, and it sang at like 3500 rpms on the highway at 60mph. Very tiresome. I did a World Class T5 (2.95 1st, .59 or so OD -IIRC) 5 speed swap and loved it. I left the 4.11's, but even with an aluminum flywheel, 1st gear was pretty useless, and 2nd gear starts were no problem. If I had kept it, I would have done 3.50 gears and I think it would have been perfect.

Kiesler seems the best for these conversions, as they were the first to really tackle the engineering side of these things:

http://www.keislerauto.com/gm/chevelle-gen2-kits.html

If you want to keep your 4.10's, I'd go with the TKO600 highway OD model for sure. With a TKO500 and that steep 3.27 first gear, you'll probably want to go back to 3.55's or maybe even 3.23's if its quarter mile days are over.

If that audio track has made you want the Muncie, then by all means go for the wide ratio M20-geared unit. That 2.20 M21/M22 1st gear is just so high. (In '63 Bill Jenkins used Ford T-10 2.36 first gears instead of Chevy 2.20 gears in his 409/Z11 race cars for an advantage.) I much preferred the M20 in my RS Z28 over the M21 in my first Z. But the 5 speeds I've had were by far my favorites overall.

Just my $.02.....

[olredalert]

-------Just a thought but how about a super T-10. Even wider spread of ratios than an M20. 1st is in the 3.0s Makes for a really nice 1st with a set of 355s.........Bill S

[Fast67VelleN2O]

Just watch this movie for info on M22

https://www.youtube.com/watch?v=JosOgWEwOaw