Ordering parts for my first 4l80 rebuild, and kits/numbers/brands are all over the place in listings, or parts just aren't listed good. I've skimmed/scanned/read several of the posts on here and various other sites to get an idea. So hopefully, thanks too all previously posting questions and others giving guidance already. Just want to see if I'm missing anything or any strong recommendations of something I'm forgetting, or should replace.
Vehicle 2001 Silverado 2500HD4x4 200k+ miles. Tow/Farm vehicle. Not a drag/race deal, will need good reverse. Bought truck fairly cheap figuring transmission was messed up already. Could part it out and make money, but would rather use it. Had bad break lines so couldn't test drive. After fixing lines on test drive when cold it would barely shift into 3rd and hold it, but would go into OD if I could make it to 3rd with light throttle pressure and would hold OD. Reverse, 1st and 2nd seemed fine. As it warmed up, just reverse 1st and 2nd, and could not get 3rd and transmission temp would peg if I kept driving in 2nd(has factory gauge). No codes and the fluid was burnt. Original transmission never rebuilt. Will most likely tow 20ft car trailer to race tracks more than anything else.
For ordering parts I had best luck with transpartonline listings, so I'm just ordering majority from them.
#34006EBX: Master Kit with Steels, 4L80E (with Bonded Rubber Pistons & Turbulator Steels) (97-Up) (BORG WARNER FRICTIONS TransTec Overhaul Kit)) (No Pan Gasket) INCLUDED: 34002EAX TransTec Overhaul Kit, B34119E Borg Warner Friction Module, 34139EA Steel Module, K33900F-4 Bonded Rubber Piston kit
Includes: All Friction & Steel plates, Sealing Rings, Clad Seals, Gasket & Seal kit
#B34024E: BAND REAR TH400 / 425 / 4L80E (BORG WARNER BRAND) LATE DESIGN HIGH ENERGY LINING BORG WARNER
#B34022E: BAND, FRONT 1.25" WIDE 4L80E 1996-UP (BORG WARNER) FRONT SERVO PISTON HAS .273" DIAMETER SHAFT
#34476: CARRIER OUTPUT SILENCER RING TH400 (64-UP) 4L80E (91-98)
#34446: rostra HARNESS INTERNAL: 4L80E (94-03)
Durabond Bushing kit TK-4A from somewhere else, they didn't have it listed.
I had already ordered a sonnax 'The Sure Cure Kit' hoping it was just a valve body issue before facing facts that the trans needed a full rebuild. This kit includes the following:
I plan on dual feeding, and I believe I can rollerize output with the sonnax bushing listed above.
Now for some questions:
1. I have seen where Clinebanger has said buy sonnax kit line pressure kit # 4L80E-LB1. Is it that much different than the kit listed above #34200-01K? For $20 I can order it separate, if there is a worthwhile difference. I believe Clinebanger also suggested another o-ring plug kit, with a different number.
2. Do I need to still drill the 'lube to line bypass' I read somewhere sonnax had a fix/part wasn't sure if is covered in the parts above
3. If I'm not turning the high rpms, is it still recommended to drill a .030" hole at the edge of the direct drum
4. Is it worth ordering 4LCC/UDCPK and another friction. Or their teflon coated pump set from ck performance for a first time build, or is their some other worthwhile parts that should be ordered from them.
Trying to learn these things as I work on it. I have several other 4l80's in the fleet of chevy's between me and father, so might as well figure out a program for them. Also have some project vehicles in future that these trans will be put into.
I've worked on just about everything else on car, might as well try fixing one of these.
Thanks for any info or suggestions.
Vehicle 2001 Silverado 2500HD4x4 200k+ miles. Tow/Farm vehicle. Not a drag/race deal, will need good reverse. Bought truck fairly cheap figuring transmission was messed up already. Could part it out and make money, but would rather use it. Had bad break lines so couldn't test drive. After fixing lines on test drive when cold it would barely shift into 3rd and hold it, but would go into OD if I could make it to 3rd with light throttle pressure and would hold OD. Reverse, 1st and 2nd seemed fine. As it warmed up, just reverse 1st and 2nd, and could not get 3rd and transmission temp would peg if I kept driving in 2nd(has factory gauge). No codes and the fluid was burnt. Original transmission never rebuilt. Will most likely tow 20ft car trailer to race tracks more than anything else.
For ordering parts I had best luck with transpartonline listings, so I'm just ordering majority from them.
#34006EBX: Master Kit with Steels, 4L80E (with Bonded Rubber Pistons & Turbulator Steels) (97-Up) (BORG WARNER FRICTIONS TransTec Overhaul Kit)) (No Pan Gasket) INCLUDED: 34002EAX TransTec Overhaul Kit, B34119E Borg Warner Friction Module, 34139EA Steel Module, K33900F-4 Bonded Rubber Piston kit
Includes: All Friction & Steel plates, Sealing Rings, Clad Seals, Gasket & Seal kit
#B34024E: BAND REAR TH400 / 425 / 4L80E (BORG WARNER BRAND) LATE DESIGN HIGH ENERGY LINING BORG WARNER
#B34022E: BAND, FRONT 1.25" WIDE 4L80E 1996-UP (BORG WARNER) FRONT SERVO PISTON HAS .273" DIAMETER SHAFT
#34476: CARRIER OUTPUT SILENCER RING TH400 (64-UP) 4L80E (91-98)
#34446: rostra HARNESS INTERNAL: 4L80E (94-03)
Durabond Bushing kit TK-4A from somewhere else, they didn't have it listed.
I had already ordered a sonnax 'The Sure Cure Kit' hoping it was just a valve body issue before facing facts that the trans needed a full rebuild. This kit includes the following:
1-2 & 2-3 Shift Valve Spring Kit 34994-02K
Boost Valve Kit 34200-01K
Actuator Feed Limit Valve Kit 34200-16K
Case Bushing 34006-SP
Forward Clutch Hub Washer (Rear) 34301-078
Front/Rear Unit Endplay Shim 34500-Z
O-Ringed End Plug Kit 34994-14K
O-Ringed End Plug Kit 34994-13
Stator Support Bushing 34016-W
Checkball 10000-08
TCC Regulator Valve Kit 34994-01K
I have 2 pdf manuals CLiff Mccormick and ATSGI plan on dual feeding, and I believe I can rollerize output with the sonnax bushing listed above.
Now for some questions:
1. I have seen where Clinebanger has said buy sonnax kit line pressure kit # 4L80E-LB1. Is it that much different than the kit listed above #34200-01K? For $20 I can order it separate, if there is a worthwhile difference. I believe Clinebanger also suggested another o-ring plug kit, with a different number.
2. Do I need to still drill the 'lube to line bypass' I read somewhere sonnax had a fix/part wasn't sure if is covered in the parts above
3. If I'm not turning the high rpms, is it still recommended to drill a .030" hole at the edge of the direct drum
4. Is it worth ordering 4LCC/UDCPK and another friction. Or their teflon coated pump set from ck performance for a first time build, or is their some other worthwhile parts that should be ordered from them.
Trying to learn these things as I work on it. I have several other 4l80's in the fleet of chevy's between me and father, so might as well figure out a program for them. Also have some project vehicles in future that these trans will be put into.
I've worked on just about everything else on car, might as well try fixing one of these.
Thanks for any info or suggestions.