great, there goes my tranny - The 1947 - Present Chevrolet & GMC Truck Message Board Network

ocbaud · 02-17-2009, 11:35 PM

so i get the freaking carb running ace on the truck. better than it has ever ran before, and what happens......?

the freaking transmission starts taking a crap on me!

not sure when it first broke, but when driving in town, its not really slipping, but if i'm accelerating in drive, it down shifts to 2nd and then doesn't want to move back up into drive unless i do it manually. the rpms when crusing act as though it is in drive(1:1) but if you accelerate, it revs up to where it would be if it were in 2nd gear and then "catch" and start going.

drove it to work today and started doing it on the way back home.

gchemist · 02-17-2009, 11:38 PM

Is the oil level okay? Is the detent cable okay?

Walts_restoration · 02-17-2009, 11:43 PM

th350 or 700r4 or th400? lets start with the basics. lol.

ocbaud · 02-17-2009, 11:49 PM

th350
oil is okay, i've checked all that cooler lines and no leaks at all

Walts_restoration · 02-18-2009, 12:20 AM

the th350 that was rebuild sometime before i got my 1980 camaro does the same thing, except it no longer even holds drive. I beleive it has to do with the bands on the third gear clutch pack, or something like that. Im no guru on automatics though. Mine has the trait of pushing the dipstick up, have you noticed yours pushing the dipstick outta place?

ocbaud · 02-18-2009, 12:40 AM

nope, dipstick looks just fine, lol

sierra4x4 · 02-18-2009, 12:40 AM

It sure sound like your direct clutch pack is toast but the TH350 is really not as hard as most poeple think to rebuild.

ocbaud · 02-18-2009, 12:50 AM

i have one of the oddball th350c lockup ones with a crappy handmade converter.
i'll be replacing this tranny, not spending time rebuilding it

Walts_restoration · 02-18-2009, 12:58 AM

ive got one of thsoe at my farm for parts, my moms monte has the th250c! or so our gm guy told us. They apaprently also made a th200, but the th250c got a factory lower gear ratio.

hotrodhomi · 02-18-2009, 01:27 AM

http://www.tciauto.com/Products/GM/g...amatic_350.asp
try these guys.

fast75 · 02-18-2009, 05:52 AM

have you dropped the pan and checked the filter?

smashingchuck · 02-18-2009, 12:04 PM

I had the th350 in my 4x4 built for $250. Just find the local guru! Parts for these things are cheaper than dirt, and they can be rebuilt in a hurry. I just added a TCI stall and was good to go.

killthewabbit · 02-18-2009, 12:09 PM

I got a $400 reman TH350 from AutoZone that's been working great in my truck for over 6 years now. I doubt it's the best transmission in the world, but I'm ecstatic about it's value for the price I paid.

slednD1 · 02-18-2009, 04:38 PM

maybe check your detent cable adj. and make sure your trans modulator vacuum line is connected at the tranny as well as a good manifold vacuum source,not to a timed "over the throttle blade"vacuum source.

02-17-2009, 11:35 PM	#1
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	great, there goes my tranny so i get the freaking carb running ace on the truck. better than it has ever ran before, and what happens......? the freaking transmission starts taking a crap on me! not sure when it first broke, but when driving in town, its not really slipping, but if i'm accelerating in drive, it down shifts to 2nd and then doesn't want to move back up into drive unless i do it manually. the rpms when crusing act as though it is in drive(1:1) but if you accelerate, it revs up to where it would be if it were in 2nd gear and then "catch" and start going. drove it to work today and started doing it on the way back home.

02-17-2009, 11:38 PM	#2
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Re: great, there goes my tranny Is the oil level okay? Is the detent cable okay? __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

02-17-2009, 11:43 PM	#3
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	Re: great, there goes my tranny th350 or 700r4 or th400? lets start with the basics. lol. __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums

02-17-2009, 11:49 PM	#4
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	Re: great, there goes my tranny th350 oil is okay, i've checked all that cooler lines and no leaks at all

02-18-2009, 12:20 AM	#5
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	Re: great, there goes my tranny the th350 that was rebuild sometime before i got my 1980 camaro does the same thing, except it no longer even holds drive. I beleive it has to do with the bands on the third gear clutch pack, or something like that. Im no guru on automatics though. Mine has the trait of pushing the dipstick up, have you noticed yours pushing the dipstick outta place? __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums

02-18-2009, 12:40 AM	#6
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	Re: great, there goes my tranny nope, dipstick looks just fine, lol

02-18-2009, 12:40 AM	#7
sierra4x4 Registered User Join Date: Jan 2009 Location: Canada Posts: 308	Re: great, there goes my tranny It sure sound like your direct clutch pack is toast but the TH350 is really not as hard as most poeple think to rebuild.

02-18-2009, 12:50 AM	#8
ocbaud Garage Queen Material Join Date: Oct 2002 Location: USA Posts: 4,129	Re: great, there goes my tranny i have one of the oddball th350c lockup ones with a crappy handmade converter. i'll be replacing this tranny, not spending time rebuilding it

02-18-2009, 12:58 AM	#9
Walts_restoration Real Projects never die Join Date: Jan 2007 Location: Lawrence, kansas Posts: 1,508	Re: great, there goes my tranny ive got one of thsoe at my farm for parts, my moms monte has the th250c! or so our gm guy told us. They apaprently also made a th200, but the th250c got a factory lower gear ratio. __________________ Ill put it this way, ive got a few lawn ornaments My name tag says Ryan KansasTwister On other forums

02-18-2009, 01:27 AM	#10
hotrodhomi Registered User Join Date: Apr 2004 Location: Sacramento Posts: 3,737	Re: great, there goes my tranny http://www.tciauto.com/Products/GM/g...amatic_350.asp try these guys. __________________ '72 2wd blazer, bagged w/ watts link & EDC '72 C10 "Lowered Farm Truck" STOLEN 5-18-11 '66 impala ht

02-18-2009, 05:52 AM	#11
fast75 Go Hard or Go Home! Join Date: Dec 2008 Location: quitman, tx Posts: 261	Re: great, there goes my tranny have you dropped the pan and checked the filter? __________________ 75 short wide 350, some mods, scare the piss outta ya quick. 2008 Dodge crew cab. YEAH, it's got a hemi, your ass is going to jail quick. Some day's, it's just not worth chewing through the restraints................................

02-18-2009, 12:04 PM	#12
smashingchuck It'd be alot cooler if you did Join Date: May 2003 Location: Three Rivers, MI Posts: 2,345	Re: great, there goes my tranny I had the th350 in my 4x4 built for $250. Just find the local guru! Parts for these things are cheaper than dirt, and they can be rebuilt in a hurry. I just added a TCI stall and was good to go. __________________ 78 Build Thread 4Runner Build

02-18-2009, 12:09 PM	#13
killthewabbit Spear and magic helmet! Join Date: Oct 2006 Location: Nashville, TN Posts: 1,226	Re: great, there goes my tranny I got a $400 reman TH350 from AutoZone that's been working great in my truck for over 6 years now. I doubt it's the best transmission in the world, but I'm ecstatic about it's value for the price I paid. __________________ -- Will

02-18-2009, 04:38 PM	#14
slednD1 Registered User Join Date: Feb 2009 Location: ANTIOCH CALIFORNIA Posts: 61	Re: great, there goes my tranny maybe check your detent cable adj. and make sure your trans modulator vacuum line is connected at the tranny as well as a good manifold vacuum source,not to a timed "over the throttle blade"vacuum source.



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