Blksilvr

iTrader: (16)

OK I'm looking for a 6sp to put in my TA. It has 3:42 gears.
My question is how many different type 6sp did Gm make ?
Does anyone know the gear ratios for those tranny's and what the factory rear gear ratio is? or Did GM make only one tranny for all 6 sp cars ?
If you know where I can find a 6sp pm me.


Thx
Rik

Black02SLPSS

iTrader: (5)

Fbodies, and base C5 corvettes got the MN6 version, the GTO's and the Z06 vettes got the MN12 version. Differences would be that the MN12 has better blocker rings and more aggressive gearing than the MN6. Im sure others who know more will chime in

PewterScreaminMach

iTrader: (7)

That pretty much sums it up. Most stock 6-speeds came with 3.42s in the rear.

99z28monster

iTrader: (3)

Pretty sure the 1-4 are the same gearing on the two six speeds.

LS1W66

All the gears except 4th are different between the MN6 and MN12
Off the top of my head I know the MN6 has a 2.66 first gear and the MN12's is 2.97

jmm98LS1

iTrader: (28)

mn12
1st Gear 2.97:1
2nd Gear 2.07:1
3rd Gear 1.43:1
4th Gear 1.00:1
5th Gear 0.84:1
6th Gear 0.56:1


mn6
1st gear 2.66:1
2nd gear 1.78:1
3rd gear 1.30:1
4th gear 1.00:1
5th gear 0.74:1
6th gear 0.50:1