transmission problems (i think) - The 1947 - Present Chevrolet & GMC Truck Message Board Network

krazy_texan · 02-24-2003, 12:04 PM

ok my problem is getting worse i will be driving around town and when i come to a stop, when i get ready to leave the stop i will apply the gas and the truck will rev for a little bit and then it will catch and start going with a haevy jolt is this my transmission screwing up, any and all help is appreciated as this is my dailey driver and my burb is no where near street ready

mtdave2 · 02-24-2003, 12:10 PM

are you low on trany fluid??

krazy_texan · 02-24-2003, 12:13 PM

it has plenty of fluid i checked it last night

kxmotox247 · 02-24-2003, 12:48 PM

Quote:

Originally posted by mtdave2
are you low on trany fluid??

That's the first thing I would check. Make sure your vacumm line is hooked up with no air leaks also.

Other than those two pointers...I don't know.

72CustomCamper · 02-24-2003, 12:56 PM

Sounds like one or more of the friction plates is burned up. First chance you get, pull the pan and filter and look for little pieces of what looks like burnt paper.

Another check: smell the fluid on the dipstick. If it smells like paint thinner, the fluid is shot.

If there is none of that then maybe the torque converter is somehow not getting enough fluid...

The 4L80E in my '93 started doing that...$2600 later, it is better than new with custom fluid ports for cooling and a solid shift-kit.

Your tranny shouldn't cost half of that for a complete rebuild.

Jason71k10 · 02-24-2003, 03:11 PM

that kinda sounds like what mine is doing, but mine actually goes in to nuetral when i'm at a stop light. The shifter(on the column) doesn't actually move, but if i wiggle it just a bit, it goes back into drive?? It seems to do it only before the engine is nice and warm

anyone have any ideas on that one?? it's a th350 and was rebuilt about 8k miles ago(about a yr and an half)

**COBALT** · 02-24-2003, 04:24 PM

Make sure you have a bottle of ATF around. Dip your finger in it and check it against the dip stick reading. If the fluid on the dip stick is darker than what's in the bottle then your clutch packs are buring up. If your fluid is even got a brown-ish color then it's time to rebuild the transmission.

02-24-2003, 12:04 PM	#1
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	transmission problems (i think) ok my problem is getting worse i will be driving around town and when i come to a stop, when i get ready to leave the stop i will apply the gas and the truck will rev for a little bit and then it will catch and start going with a haevy jolt is this my transmission screwing up, any and all help is appreciated as this is my dailey driver and my burb is no where near street ready __________________ Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO

02-24-2003, 12:10 PM	#2
mtdave2 newly minted old timer Join Date: Dec 1999 Location: Hudson WI Posts: 3,521	are you low on trany fluid?? __________________ ____________________________________________ 72 c20 longhorn 65k org miles and counting! 69 k10 Suburban

02-24-2003, 12:13 PM	#3
krazy_texan Registered User Join Date: Oct 2002 Location: West Des Moines, Ia Posts: 3,233	it has plenty of fluid i checked it last night __________________ Krazy Texan My Trucks are made with Wrenches not Chop Sticks 1967 GMC 3/4 ton "Johnny Cash" 1990 v1500 suburban 1967 Ford f100 Swb 4x4 "green bean" GOD BLESS JESUS, JOHN WAYNE, AND THE ALAMO

02-24-2003, 12:56 PM	#5
72CustomCamper Registered User Join Date: Feb 2003 Location: Bremerton, WA Posts: 86	Sounds like one or more of the friction plates is burned up. First chance you get, pull the pan and filter and look for little pieces of what looks like burnt paper. Another check: smell the fluid on the dipstick. If it smells like paint thinner, the fluid is shot. If there is none of that then maybe the torque converter is somehow not getting enough fluid... The 4L80E in my '93 started doing that...$2600 later, it is better than new with custom fluid ports for cooling and a solid shift-kit. Your tranny shouldn't cost half of that for a complete rebuild. __________________ '72 GMC C20, "2500 Super Custom", Custom Camper, New 454 '93 K2500 Suburban, Old 454 (157K)

02-24-2003, 04:24 PM	#7
COBALT Senior Member Join Date: Sep 2001 Location: Seattle, WA, USA Posts: 5,817	Make sure you have a bottle of ATF around. Dip your finger in it and check it against the dip stick reading. If the fluid on the dip stick is darker than what's in the bottle then your clutch packs are buring up. If your fluid is even got a brown-ish color then it's time to rebuild the transmission. __________________ '69 3/4 ton C20 2wd-350ci/TH400 '69 3/4 ton Custom 20 2wd-350ci/4sp Manual '99 2wd 5.7 Chevy Tahoe Seattle, WA.

02-24-2003, 03:11 PM	#6
Jason71k10 ready for reassembly Join Date: Jun 2002 Location: Barrie ONT, Canada Posts: 413	that kinda sounds like what mine is doing, but mine actually goes in to nuetral when i'm at a stop light. The shifter(on the column) doesn't actually move, but if i wiggle it just a bit, it goes back into drive?? It seems to do it only before the engine is nice and warm anyone have any ideas on that one?? it's a th350 and was rebuilt about 8k miles ago(about a yr and an half)



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