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4L80/85E Transmissions. 6L90 Transmission Discuss the 4L80/85E transmissions found in the 6.2/6.5L equipped vehicles and Duramax equipped vans. 6L90 discussion.

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Old 07-27-2006, 12:17 AM   #1 (permalink)
J.Peart
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problem with a just installed 700r4

so a while back the 700r4 in my 6.2 blazer went. so i sent it down to my cousin to rebuild it and beef it up, and this guys knows his stuff so i knew i get a good tranny, he pretty much replaced everything (case included its almost brand new everything). the thing is now just bout as strong as it can get, great... except after i put it in and finish the work i was doing on the engine i run into a hitch... fire up the engine there is a slight whine, and when i put it into gear it whirs loud enough it can be heard clearly with the engine idling, kinda like bearing noise. i pulled the dust cover back off and there doest seem to be anything that could be rubbing, and i severely doubt anything is wrong with the tranny. any thoughts? i really dont wanna have to pull everything apart again...its rather depressing , i would much rather find out im an idiot and missed something stupid and simple. *prays for an easy fix*

thanks

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'95 Burb LT K2500- 6.5 TD L65- 4x4- 3.42 limited slip- 4l80-E- Heath Remote PMD- Bosch Duratherm glows- 2x Optima Redtops- Autometer Boost, Trans, Pyro Gauges on the A-pillar- ChrisK1500's GP override mod- airbox opened up- no snorkel- Heath performance kit stage II (GL4 chip, 4" exhaust, 3" DP. HD lift pump, AFE filter), 2.25" crossover pipe, *** Turbo, upgraded cooling, .040 over 599 block, SCAT cast steel crank, balanced rotating assembly, ARP head and main cap studs.

-89 F250 4x4- 7.3L IDI, ZF-5 manual

'87 K1500 Burb 6.2 Diesel- TH350- NP-208 T-Case - SOLD

'86 K5 Blazer Silverado- 6.2 Diesel- 700R4 HD- NP 208 T-case-3/4 ton axles w/ posi rear- 3" lift- 33" x 12.5" BFG Mud Terrain T/A's - SOLD-It will be missed...
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Old 07-28-2006, 10:51 AM   #2 (permalink)
ChampionTransmission
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What are you running for a converter>??? Might be the converter or the pump. My guess is converter but then again, I haven't heard the noise.......

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Old 07-28-2006, 03:04 PM   #3 (permalink)
J.Peart
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hmm, well i dont know the torque converters exact model but it was made by a company out of langley BC and its their heavy duty model, my cousin does trannies for a living and hes never had a prob with these, but from where the sound seems to originate i kinda think ur right..the pump i have no idea, but the sound does not seem to be coming from in the tranny itself, if i cant sort it out tonite im gonna pick up a floor model tranny jack and pull the tranny and transcase again...
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'95 Burb LT K2500- 6.5 TD L65- 4x4- 3.42 limited slip- 4l80-E- Heath Remote PMD- Bosch Duratherm glows- 2x Optima Redtops- Autometer Boost, Trans, Pyro Gauges on the A-pillar- ChrisK1500's GP override mod- airbox opened up- no snorkel- Heath performance kit stage II (GL4 chip, 4" exhaust, 3" DP. HD lift pump, AFE filter), 2.25" crossover pipe, *** Turbo, upgraded cooling, .040 over 599 block, SCAT cast steel crank, balanced rotating assembly, ARP head and main cap studs.

-89 F250 4x4- 7.3L IDI, ZF-5 manual

'87 K1500 Burb 6.2 Diesel- TH350- NP-208 T-Case - SOLD

'86 K5 Blazer Silverado- 6.2 Diesel- 700R4 HD- NP 208 T-case-3/4 ton axles w/ posi rear- 3" lift- 33" x 12.5" BFG Mud Terrain T/A's - SOLD-It will be missed...
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Old 07-30-2006, 08:44 AM   #4 (permalink)
4DR4X4
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did you get the torque converter in good, might've cracked the pump installing it, i've seen that happen.
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Old 07-31-2006, 11:34 AM   #5 (permalink)
dieselherb
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If you can get a pressure gauge to check line pressure of the pump, that tell you if its the pump or converter.
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Old 07-31-2006, 01:02 PM   #6 (permalink)
J.Peart
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thanks for your input, i ended up pulling the tranny again and upon closer inspection it was the torque. defective unit, but its being replaced. should be up and running some time this week
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'95 Burb LT K2500- 6.5 TD L65- 4x4- 3.42 limited slip- 4l80-E- Heath Remote PMD- Bosch Duratherm glows- 2x Optima Redtops- Autometer Boost, Trans, Pyro Gauges on the A-pillar- ChrisK1500's GP override mod- airbox opened up- no snorkel- Heath performance kit stage II (GL4 chip, 4" exhaust, 3" DP. HD lift pump, AFE filter), 2.25" crossover pipe, *** Turbo, upgraded cooling, .040 over 599 block, SCAT cast steel crank, balanced rotating assembly, ARP head and main cap studs.

-89 F250 4x4- 7.3L IDI, ZF-5 manual

'87 K1500 Burb 6.2 Diesel- TH350- NP-208 T-Case - SOLD

'86 K5 Blazer Silverado- 6.2 Diesel- 700R4 HD- NP 208 T-case-3/4 ton axles w/ posi rear- 3" lift- 33" x 12.5" BFG Mud Terrain T/A's - SOLD-It will be missed...
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Old 08-02-2006, 11:08 AM   #7 (permalink)
High Sierra 2500
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You are lucky... Last time that happened to me, the guy at the junkyard had cracked the pump moving the tranny around... And then sold it to me as a good trans... I found out AFTER I put it in (and being very careful not to damage the pump when I installed the tranny) that it was damaged...
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