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33 Posts
Awhile back, I posted that the Internal Reaction (Ring) Gear shattered in my 1982 GMC 2500 4x4 truck. Here are the links to my previous posts.
http://67-72chevytrucks.com/vboard/showthread.php?t=217634
http://www.hotrodders.com/forum/internal-reaction-ring-gear-shattered-700r4-103421.html
I decided to take Jonboy's advice and purchase a SRTA (Service Remanufactured Transmission Assemby) 700R4 from my local GM dealership. The price was right -- a little over $1600 plus labor -- and they come with a 3 year, 50K mile warranty. Sounds good to me. How could I go wrong?
Well, that didn't work out. I visited two GM dealerships. GM doesn't offer a SRTA 700R4 for the 1982 thru 1986 model years -- only for 1987 and newer. GM won't honor their warranty on a 1987 SRTA installed in a 1982.
I asked them to go ahead and install it without warranty. Still, they declined to install it. I believe it is because of the differences in the vacuum/electronic mechanism for the Torque Convertor Lock-up between 1982 and 1987 model years.
In case anyone is interested, GM offers a performance grade AL60-E transmission for older model years, including 4x4 trucks.
p/n 19156259, trans, $2,174.00
p/n 12497316, (computer) module, $1,284.00
They even offer an AL85-E for slightly more money.
This leaves me with two options:
1) Purchase a crate 700R4 from a rebuilder.
2) Purchase a used 700R4 from a salvage yard 700R4 and have it rebuilt locally.
Question #1
Many shops here in Indiana have strongly recommended that I stay with a 1982-1986 700R4. Everything that I've read says otherwise -- I should upgrade to 1987 or newer. Should I continue searching for a shop that is willing to install a 1987 700R4 in my 1982 vehicle?
Question #2
How does the factory mechanism to lock-up the torque convertor in my 1982 vehicle actually work? I see some vacuum hoses. I see a thermo-valve. I see a solenoid with two wires. I think that I see a one-wire connector on my 1982 torque convertor. I can't find anything to un-lock the TC using the brake light circuit.
Question #3
Will the 1982 factory mechanism work properly on 1987 TC? I believe that the one-wire solenoid on 1982 grounds internally to transmission case. I believe that the two-wire solenoid on 1987 allows me to place an override switch on the external ground wire.
Question #4
I am aware of...
TCI AUTO TCI-376600 Torque Converter Lockup Kit
http://www.tciauto.com/Products/GM/gm_2004r.asp
http://store.summitracing.com/partdetail.asp?autofilter=1&part=TCI-376600
http://www.jegs.com/webapp/wcs/stores/servlet/product2_10001_10002_748599_-1
B&M TC Lock-up Kit
http://www.bmracing.com/
http://store.summitracing.com/partdetail.asp?autofilter=1&part=BMM-70244
Painless Wiring TC Lock-up Kit - 764-60109
http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_747219_-1_10733
What are the advantages of using these kits over my 1982 factory mechanism?
http://67-72chevytrucks.com/vboard/showthread.php?t=217634
http://www.hotrodders.com/forum/internal-reaction-ring-gear-shattered-700r4-103421.html
I decided to take Jonboy's advice and purchase a SRTA (Service Remanufactured Transmission Assemby) 700R4 from my local GM dealership. The price was right -- a little over $1600 plus labor -- and they come with a 3 year, 50K mile warranty. Sounds good to me. How could I go wrong?
Well, that didn't work out. I visited two GM dealerships. GM doesn't offer a SRTA 700R4 for the 1982 thru 1986 model years -- only for 1987 and newer. GM won't honor their warranty on a 1987 SRTA installed in a 1982.
I asked them to go ahead and install it without warranty. Still, they declined to install it. I believe it is because of the differences in the vacuum/electronic mechanism for the Torque Convertor Lock-up between 1982 and 1987 model years.
In case anyone is interested, GM offers a performance grade AL60-E transmission for older model years, including 4x4 trucks.
p/n 19156259, trans, $2,174.00
p/n 12497316, (computer) module, $1,284.00
They even offer an AL85-E for slightly more money.
This leaves me with two options:
1) Purchase a crate 700R4 from a rebuilder.
2) Purchase a used 700R4 from a salvage yard 700R4 and have it rebuilt locally.
Question #1
Many shops here in Indiana have strongly recommended that I stay with a 1982-1986 700R4. Everything that I've read says otherwise -- I should upgrade to 1987 or newer. Should I continue searching for a shop that is willing to install a 1987 700R4 in my 1982 vehicle?
Question #2
How does the factory mechanism to lock-up the torque convertor in my 1982 vehicle actually work? I see some vacuum hoses. I see a thermo-valve. I see a solenoid with two wires. I think that I see a one-wire connector on my 1982 torque convertor. I can't find anything to un-lock the TC using the brake light circuit.
Question #3
Will the 1982 factory mechanism work properly on 1987 TC? I believe that the one-wire solenoid on 1982 grounds internally to transmission case. I believe that the two-wire solenoid on 1987 allows me to place an override switch on the external ground wire.
Question #4
I am aware of...
TCI AUTO TCI-376600 Torque Converter Lockup Kit
http://www.tciauto.com/Products/GM/gm_2004r.asp
http://store.summitracing.com/partdetail.asp?autofilter=1&part=TCI-376600
http://www.jegs.com/webapp/wcs/stores/servlet/product2_10001_10002_748599_-1
B&M TC Lock-up Kit
http://www.bmracing.com/
http://store.summitracing.com/partdetail.asp?autofilter=1&part=BMM-70244
Painless Wiring TC Lock-up Kit - 764-60109
http://www.jegs.com/webapp/wcs/stores/servlet/product_10001_10002_747219_-1_10733
What are the advantages of using these kits over my 1982 factory mechanism?