JABCamaro

I'm considering a 2002 4l60e donor tranny that I would like to swap out with my high mileage 1998 Z28 4l60e. I've heard the 2002 bellhousing is 3/4" longer due to a longer input shaft and deeper TC. I was hoping it would be a simple swap but it sounds like there may be some modifications involved. Does anyone know anything about the 4l60e. I've read in 2000 it was improved, including a 300mm input shaft which increased the over all case length. Thanks.

MaroonMonsterLS1

Sounds like the facebook post I read today. You've gotten the correct answer there already...but it sounds like you've picked up some of the incorrect information and re-written it here.
The 98 and 2002 trans (if both joined to LS1) will be the same. input shaft and bell will be the same. torque converter will be the same.

As stated in that facebook thread...01 and 02 had a very minor valve body difference (annular lockup for those who care)...but it will swap with the 98 case with 0 issues. The electronics are the same...the lockup functions the same...etc for all intents and purposes...they are the same.

You can easily swap these trannies and they will interchange perfectly. direct bolt in swap.

FirstYrLS1Z

iTrader: (4)

I did a 2001 Firebird LS1 tranny into my 1998 LS1 Camaro 6 years ago, perfect match.

Mazinger Z

I have the pump, valve body and electronics off a 97 1 piece 4L60e

I want to rebuild a 2004 4L60e case with the above parts off the 97 trans with the LS 300mm Input shaft, the correct longer pump stator support and a new 300mm torque converter and a rebuild kit.

does any body see any problem in using the parts off the 97 trans to rebuild the 2004 case?

thanks
MZ

mrvedit

Mazinger:
First, welcome to the forum!
Second, I know your first post had to be to an existing thread and you did post on a closely related thread, but in the future, please start your own thread when you have a problem solving question.

Now to answer your question, the valve body and its solenoids should work on a 2004. I don't know if a 298mm pump can be converted to 300mm operation even with the stator support replacement, which BTW is not trivial. I see and have bought excellent condition 300mm pumps on ebay for about $100.

One question to consider is how old (or many miles) are those '97 parts. If those are the original solenoids or electrical harness, I would suggest not re-using them. VBs also wear out, especially in the TCC valve area. We all try to save money, but I hate to see someone spend hours rebuilding a trans with old parts, then more hours installing it, and have have an immediate (or soon) failure due to the old parts. What happened to the 2004 pump and VB?

Mazinger Z

Thanks for your response, I have been looking at this forum for a long time, most of the times the answers are already posted, which is very good, will follow your advise next time.

I only got the 2004 4L60e case and input shaft/drum, the 97 pump, VB and electronics were purchased reman off ebay 3 years ago and had done less than 10k miles, these were working fine on the older transmission before I pulled them out due to a case failure.

I should have started by saying that the trans is already built and shifting good with a minor annoyance with the TCC unlocking while coasting at cruising speeds.

I re-used the early EPC and it's harness, apart from the connector, is there any difference between the early and late EPC? I keep reading conflicting information about using the early EPC on the 2004 trans case.

A transgo separator plate was installed with the VB.

Do you foresee any long term problems with this setup?

The Pump part number is 24201073 which seems to be used from 96 to 2005 before the speed sensor got introduced in the pump.

the VB part number is 4203537 which appears to be used on 96-97 units.

Thanks
MZ

Tranzman

"I re-used the early EPC and it's harness, apart from the connector, is there any difference between the early and late EPC? I keep reading conflicting information about using the early EPC on the 2004 trans case."
The EPC connector was changed but the function was not changed at all. Same Hertz Signal, same Ohms of resistance values, same amp operating range. (.1amp-1.1amp.)Sonnax even make a wire harness adapter to use a early EPC in a Late unit. Most of the trade feels the early EPC's are better and more reliable. I personally have used/sold transmissions from both era's in both early and late as a whole unit.

Mazinger Z

Thanks for the confirmation on the EPC, interesting info.

I looked at the types of VB mentioned on sonnax website and the only difference I could see between the 97 (048) and 04 (051) VB is the TCC Annular Exhaust Port presence on the later model. Am I right or missing something?

since I am using the 97 VB, Would this difference unlock the TCC while coasting at cruising speeds? The TCC locks right back on once I am back on the gas pedal.

would there be anything to be concerned about by using the 97 pump and VB on the 2004 case? Would appreciate some advise here, I don't mind buying another reman pump/VB/electronics if needed. I am obviously concerned about durability, but due to time constraints and remote location the trans had to be rebuilt with what we had.

thanks
MZ

james28909

sorry for digging up this old thread. so a valve body with an annular lockup (00-02 according to sonnax indentification chart) will work in place of a 1998 non annular lockup? do i need to make sure to use my 1998 seperator plate or do i need to get the appropriate seperator plate as well? what about the pump? would the 1998 pump and seperator plate be the thing to use with the annular lockup valvebody?

MaroonMonsterLS1

you can swap the valve body
easiest route will be to just get a transgo plate that works from like 96-06
otherwise, use the 00-02 plate with the 00-02 vb