k0261886

iTrader: (5)

Hey guys,
I was wondering if there are any issues with putting a 1993 t56 into a 1995 car? The 95 is already a 6 speed car, he is just having issues with trans, and wants a new one, and I found a good deal on a 1993 trans. Please help?

the_merv

iTrader: (88)

It'll work. Is it a M29?

ss.slp.ls1

iTrader: (36)

It should bolt right up. If it's a M29, It will be faster!

k0261886

iTrader: (5)

I would assume that its the M29, I thought that they came in all 1993 cars? They are faster because the gearing ratios are slightly different correct?

the_merv

iTrader: (88)

Not all were M29's..only the ones with 3.23 Rear Gears I beleive.

ss.slp.ls1

iTrader: (36)

LT1 M29 T56 6-speed trans uses "Z06" ratios; (2.97:1, 2.07:1, 1.43:1, 1.00:1, 0.80:1, 0.62:1) vs. the standard LT1 T56 ratios; (2.66:1, 1.78:1, 1.30:1, 1.00:1, 0.74:1, 0.50:1)

k0261886

iTrader: (5)

So if it came with 3.42s then it will be a t56? Are there any visual differences that I will be able to tell whether its a m29?

the_merv

iTrader: (88)

That's also the new GTO ratios aswell..

k0261886

iTrader: (5)

https://ls1tech.com/forums/midwest-c...peed-sale.html

Thats the one that I'm looking at having him pick up. Can you tell if that is a m29 or t56? Thanks a bunch for the help guys.

ss.slp.ls1

iTrader: (36)

AFAIK, 3.23's was the highest rear end gear ratio offered in '93.

the_merv

iTrader: (88)

Here is something I just found..

F-Body T56 Ratios
1993 Manual (M28):
1st - 3.36
2nd - 2.07
3rd - 1.35
4th - 1.00
5th - 0.80
6th - 0.62
Rear axle - 2.73

1993 Manual (M29)
1st - 2.97
2nd - 2.07
3rd - 1.43
4th - 1.00
5th - 0.80
6th - 0.62
Rear axle - 3.23

1994 and UP (MN6)
1st - 2.66
2nd - 1.78
3rd - 1.30
4th - 1.00
5th - 0.74
6th - 0.50
Rear axle - 3.42


That M28 has a low first Gear..

ss.slp.ls1

iTrader: (36)

I'd rather have the taller 3rd gear ratio.

the_merv

iTrader: (88)

I guess you are going to have ask him what codes are in the Glove Box of that car..it's definately a 1993.


No doubt.. I like my 60-110mph pulls in just 3rd.

k0261886

iTrader: (5)

So basically what you guys are saying is to have him look in the glove box and get the rpo code, then figure out what rear-end was in the car right? But no matter what, this thing will bolt, and worst case scenario is that I just end up with a plain jane t56 like I have right now. If I get lucky I'll get one of the others with either a better 1st gear ratio or a better 3rd gear, correct?

ss.slp.ls1

iTrader: (36)

Pretty much. What's the price you're picking it up for?

rat93

iTrader: (2)

so how do you tell if your 93 has a m28 or m29? (sorry, not trying to hijack thread)

k0261886

iTrader: (5)

Thanks a ton for the help thus far guys. Just one more question. Were the m29 transmissions any weaker than the t56? (It appears the trans is an m29) Just this last question then I'll leave you guys alone, lol.

97badass

iTrader: (8)

it will work hassle free i just done the same thing. i picked mine up with a fairly fresh rebuild for 400 off craigslist

k0261886

iTrader: (5)

bump.

ss.slp.ls1

iTrader: (36)

I don't see why it would be weaker. Yeah the gears are taller, but I don't see it being much weaker.