So with the parts cars finally home, I've got an AWD tranny with the code "c51ph fp6607".

My searches tell me it's from a Gallant vr4.

Can anyone tell me more about this tranny?

I'm curious to know it's gear ratio.

Not sure what trans code that is. But if it's from a Galant, 1st is taller and 2nd to 5th is the same as a 1G. If it's the a JDM trans could have 3.909 diffs if it's post 1989 I believe.

I did discover the same after having researched it more.

It's difficult finding concrete info on an item over 20 years old using the Internet.

But thanks for the reply Corte.

C51PH is just a 1990 style DSM gearset with a taller/weaker gallant VR4 1st gear.

In other words Reza, you don't recommend a car pushing more than 500hp to use it?

I didn't say that, I was just telling you what tranny it is. With over a decade worth of DSM info out there, you can use the information for what it's worth!

Mentioning "weaker" is pretty implied no? In your experience, do you recommend it?

The taller VR4 1st gear is known to be the weakest and can break easily (I have broken them). The rest of the gears are single syncro and the 3-4 is heavy duty just like any other 1990 transmission. I ran many 10 second passes on the exact same transmission and have blown the same transmission up. Same could be done on a stock 2g tranny, 1g tranny, evo3 gearset etc.

In a perfect world sure it could handle 500HP, but I don't really assign HP ratings to a tranny unless I build it myself now. There are other factors involved so I can't really tell you how good or how crap that 25 year old transmission is

What I can say is sure the 3-4 gears are heavy duty and can handle pretty much anything you throw at them as long as they are in good shape.

That's very helpful info!

Thank you Reza!

I've been running a VR4 gearset in my 2G for the last 3-4 years. Seen several 130+MPH runs but sadly never pushed anything lower than a 1.7s 60 ft. (always slightly preloaded)
I'm sure with a set of slicks I could do some damage though.

Any specific reason why you ran with a VR4 gearset in your 2G?

Pros/Cons?

Taller 1st gear seems like reason enough to me. Then swap in the evo 5th. Which I still have brand new in box lol

I cut some very good 60 foots with that 1st gear. It was when I did repeated back to back launches, I stripped all the teeth clean off the gear. This is after about 4 back to back launches.

Just let the trans cool down 20 to 30 minutes before passes and it will more than likely stay together...

Exactly what I do Reza. I'm never too eager to run back to back. I'd rather get one less pass and still drive it home.

Mike, only reason I went with that gear set is it was already in the transmission when I bought it. Plus it's a switchable 2WD/4WD.

That the same C51PH I've got from the '93 awd parts car? I read something about it but didn't look any further into it...

Switchable? COOL.