i am haveing a disagreement with someone abou the year the 700r4 was changed. are the 83 to 84 the same then 85 to 87, then 87 to 92? or is it just 83 to 86 and 87 to 92
input shaft to tc spline count is the main question, did the stock 86 700r4 have a 27 spline or a 30?

 

Around the middle of 1984 they went from 27 to 30 spline. The 27 splines were not really that weak as most people say. I have never seen a 27-spline break, but I have seen 30-splines break. When setup correctly they both should work ok.
Hope This Helps!!!

 

Reread the topic!!

[This message has been edited by IROCZTWENTYGR8 (edited April 26, 2001).]

 

then why does the tech section say the changed from 27 to thirty spline in 87?

 

I HAVE seen a lot of 27 spline shafts break. I have also used early setups on my own stuff with no problem. Given a choice I would use the 30.

 

WELL 442 GUY I AM THE GUY WHO YOU HAVE BEEN DISAGREEING WITH AND YOU KNOW THAT THE TRANS YOU SOLD ME WHICH YOU SAID WAS AN 86 700R-4 IS NOT AND IS AN 82-84 SO WHY DONT YOU REFUND MY MONEY AND MAKE THINGS RIGHT INSTEAD OF TRYING TO SLITHER YOUR WAY OUT,I POSTED ABOUT YOU SO IF ANYONE WANTS TO HEAR THE STORY THEN CHECK THE CLASSIFIEDS.YOU SAY IT IS MY PROBLEM BECAUSE I DIDN'T CHECK THE INPUT SHAFT BUT I DIDN'T THINK I HAD TO AS YOU SAID IT WAS AN 86 SO I KNOW AN 86 IS 30 SPLINE,BUT WHEN I WAS GOING TO DO THE SWAP I FOUND IT WAS A 27,EITHER WAY YOU TOLD ME ONE THING AND SOLD ME ANOTHER,AND THATS WRONG, YOU NEED TO KNOW YOUR STUFF BEFORE YOU SELL IT,ADVERTISE IT,AND TELL PEOPLE ITS ONE THING AND GIVE THEM ANOTHER,DOES ANYONE AGREE?

 

In 87 gm upgraded the valvebodys and increased the sprag(s) strength along with some other things.

 

It was 1988 that the late valve body began to come into use. The 1987 still used the early type valve body (1982-1986).
Hope This Helps!!!

 

Ok, now I am confused. The FAQ section indicates that 87 was the year of the valve body change. I have also read this in other locations. Now I am going to have to look at the pan to be sure.

 

Pro Built is mostly correct. 1987 was the transitional year for the new style case and valvebody. You will have to know the Julian date that the tranny was built to know w/o pulling the pan off. ProBuilt is correct, because 1988 was the first FULL YEAR of production for this style. If need be, I can post the Julian date of the changeover. I own the official "GM 4L60/4L60-E Interchange Manual". Unfortunatly, it only goes from mid '86 to '97.

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GM Master Tech
ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Whatever chip I feel like burning,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE

 

OK, to further expand on what I said, the auxillary valvebody was installed on 700s starting on 279 of 1986 (October 6, 1986) but since the production run started on July 1, 1986, and ended on June 1 1987, that means GM made non-aux valvbody 700s for 3 months in '87, so there are a few out there.

------------------
If you live in Southeastern US, check us out!
South East Thirdgen

GM Master Tech
ASE Master Tech + L1
Savannah, GA

'87 Trans Am
S/D TPI retrofit including functional PassKey,
22# injectors,
Whatever chip I feel like burning,
JET AFPR, Ported Plenum,
TB Coolant Bypass, Custom Cold Air,
SSM SFC, KYB Shocks, Boxed LCAs, Wonder Bar,
8mm Accel wires,
Flowmaster Exhaust,
16" GTA rims,
Corvette Servo,
-->14.97 @ 94.9 MPH<--

'97 Bonneville SSE