Just trying to gather some info on what the differences in our transmissions are. For instance I know a lot of us have ran a 96 4L60E in our 94-95 cars with no issue, and from what I have been told the 97 is different. What about the v6 transmissions? So say would my 95 trans bolt up to a 3.8L car? Or is there wiring to be done to make it work?

 

I think really only difference would be the bell housing on the trans. Not positive on that tho. I think on my97 s10 it had the 4l60e also and I am pretty sure it looked identical to the one in my 95 formula. And that was a 2.2l 4 banger

 

I mainly ask since someone is interested in my spare trans that I'm selling and it would either be going in a 96 truck with a vortec or a 98 3.8l camaro. Just don't want to sell it thinking it will work and won't.

 

It has a removable bellhousing right?

 

http://www.roadkillcustoms.com/hot-r...smission=4L60E
From what this says that's all the gms that had the 4l60e I think some of the 97s had the 4l65e which I think is a bit smaller but I'm almost positive both have a removable bellhouse so the general could slap em into just about anything

 

Neither of the 3 trans that I have, have a removable housing. 2 95's and 1 96, the 96 is in my car now, and I have 2 different 95's laying around. I would assume the bolt pattern is a standard sbc bellhousing but that's why I asked I'm curious.

 

Simple answer is no, the V6 is a 60 degree engine so the bolt pattern is way different.

 

That's what I needed to know thank you!

 

There's our answer. Lol. So I guess they make them with different bolt patterns for the different engines?

 

It depends upon which V-6 you're dealing with...

The 3.8 is, as mentioned, is a 60 degree V-6 and is not interchangeable with the V-8's. But, a 4.3 is a 90 degree V-6 and uses the same bell housing bolt pattern as the V-8's.

The LT1 cases also had the outer "ears" cut off of the bell housing for exhaust clearance. The early S-10's used this style as well. In '96 the S-10's went to the removable bell housing configuration.

The '95 electronics are unique to the 1995 model year.

 

nice to know. I am guessing that the 95 was unique for the trans performance button that I have in my bird. I remember reading the z's were always in performance mode

 

Interesting as I have a 96 trans in my 95 car with no issues, what we're the electronics differences? I've been told the Tq converter lockup solonoid or something of the sort was one difference.

 

1/2way, the 3.8 is a 90 degree engine with a 60 degree bellhousing.

 

Pulse Width Modulation for Torque Converter Clutch lockup was added in 1995.

There is an additional solenoid that controls the rate of pulse/lockup apply. The engine harness for auto cars changed by 1 wire from 94 to 95, not counting the removable pigtail to the opti. Pin D6 on the blue connector at the PCM goes to Pin U on the trans case connector. the transmission didn't change electronically in 96 or 97. I don't think there were any mechanical changes from 95 to 97 either.

 

So if I understand this right then, there should be no issues swapping trans around from 95-97?

 

Yes, there is a difference between a 95 and a 97. I'm actually doing a write up on the an Impala forum on this for a 24x swap. but I'm learning a lot. It helps that I work in a parts dept of a dealership. So I have all the schematics and part #'s to compare.

So in any case, to the OP, One thing I happen to notice is that there are quite a few differences with the internals. Especially the solenoids. But I didn't go much further because the 6 cyl. doesn't pertain to what I'm doing.

So as far as the differences in years. 93-94 F-bodies do not use a PWM solenoid. It also uses a different 3-2 shift solenoid. In 95, the F cars use the same part # for 3-2 & PWM. In 96-02 it uses the same PWM as 95 but the 3-2 changes as does the harnesses between years.

The 93-4 uses one type of harness that does not apply for a PWM. In 95 it uses a harness that utilizes a connector that doesn't fit the newer 96-02 noid.

So based on all the solenoids, all the PCM is looking for is a specific resistance value (in ohms).

I verified a lot of this info with our trans guy at work and he's one of the best Trans techs in GM. He's just too old and ornry to carry on a conversation with. As soon as I get a chance, I'm gonna break into the old big books again to write down all the resistance values of each noid, which will help understanding it easier.

Here's a reply I got from Frank at Performabuilt, which I have their Lvl2 now. My harness is one that he refers to. it's made to accept OBDI & II. It has both type of connectors spliced in.


Also, here's a link to the thread I'm currently working on.

http://www.impalassforum.com/vBullet...&highlight=24x

 

Correct- I forgot this, thanks for mentioning. The 94-95 3-2 downshift solenoid is 9-14 ohms, the 96-02 3-2 downshift solenoid is 20-31 ohms.