New Listing 1948 - 57 chevy gm Muncie 4 Speed Transmission main gears gear Housing #591953. Or Best Offer +$74.05 shipping. Watch; S p o n s o r e d. RPO code M20 significances the 4 Speed version, this overdrive will have a code of “O”. These transmissions have cast iron case and tail housings, each transmission has a 7 bolt side cover, the units are full synchronized and the rings have 30 teeth. Electric overdrives were used on some 1966-1969 models. 2-, 4-, 5- & 6-Speed Manual Transmissions Whether you’re looking for a manual transmission as an OEM replacement part or looking to add a performance shifter to your speed machine, Summit Racing has all of the 2-, 4-, 5- and 6-speed manual trannys you need to keep charging to the front of the pack. MOPAR A833 4-SPEED TRANSMISSION & COMPONENT SPECIALISTS From the smallest part to complete conversion kits, Brewer's Performance is dedicated to helping you keep your original 4-speed Mopar shifting smoothly. We can also supply the parts you need to convert to 4-speed if your car is currently an automatic.
4 Speed Transmission Ford
4 Speed Transmission Chevy
4 Speed Transmission Power Wagon
This radical, 4 speed transmission shift pattern is 1 down, 3 up with hardened gears and shift forks.
The kit is made for those of you wanting to upgrade your stock Honda motors from a 3 speed, to a 4 speed.
It will work with both stock style, semi-auto AND manual clutch kits.
(fits into your OEM Honda cases or your import motor with crank mounted clutch)
Recommended for engine builds starting at 50cc on up to 117cc.
Fits in: The Z50, XR and CRF50, XR and CRF70, CT and SL70 and ATC and TRX70
Kit comes complete (ready to pop in) with:
-Main shaft and gears
-Counter shaft and gears
-15 tooth front large spline Z50 style sprocket
-Shift drum and hardened shift forks
Arrives assembled for you!
Primary reduction ratio: 3.722
Gear Ratio:
AHP OEM Honda
1 - 3.182 1 - 3.272
2 - 1.706 2 - 1.706
3 - 1.238 3 - 1.238
4 - 0.917 4 - You wish! :)
Quick note: 50 Primary gear count 17/69 or 70 18/67
For reference, check out the Youtube Video of case splitting to install transmission: http://www.youtube.com/watch?v=63skpwY-yTY
Please note: We have put this in many 50's and 70's we have seen in some 70's that you need a 50 kickstart gear (the gear that engages the transmission to start the bike) The 70 gear is a different tooth count than some of the older SL,ST,CT or CL 70's. Please call with any questions.