Tranny Help.... - The 1947 - Present Chevrolet & GMC Truck Message Board Network

allthrtl · 05-24-2003, 08:07 PM

The 83 swb I just bought has some tranny problems....It has a 700r4 behind a stock 305.... You put the selector in "D"rive and accellerate as normal...takes off fine, shifts to second (kinda hard but otherwise normal) but when it shifts to 3rd it starts slipping usually....If your going slow it will hold for a little before it starts slipping bad....You can manually put it back into 2nd and it will do ok..... I did notice that if you put it in 3rd, and it held, if you slow down to a stop and take off again, it jeks badly and make some very bad noises, clink, clank, clunk.....I noticed the level was a little low and added Trans-X, but it didn't seem to help after driving it around, slowly for about 10-15 miles.... Do any of you transmission smart fella's have any ideas.... I don't know crap about trannies so I'm sure I will end up at a shop, but if it sound catostraphic, I might start looking for a good used tranny from the wrecking yards and save paying the mechanics a bunch of money.....

Thanks in advance....

It doesn't do this.....

**swervin ervin** · 05-24-2003, 08:20 PM

Yep, sounds as though it is going to the tranny graveyard. Find a 700R4 out of a 88 thru 92 truck.

**old Rusty C10** · 05-24-2003, 08:29 PM

sounds like a tranny problem that i had once soon the whole tranny is gonna go bang and you wont have any forward gears. i am not sure what went in there but for sure yiou need a total rebuild keep carrying those tow truck numbers with ya lol

boataddict26 · 05-24-2003, 09:03 PM

Me and my dad just rebuilt his 700r4 outa his 91 Chevy. They are a pain but it can be done!!

gchemist · 05-25-2003, 01:02 AM

Have you checked the TV cable settings? It's amazing how many 700R4s have the TV cable out of adjustment.

Does your converter lock up in third? My 83 does. I like it. Makes the 4th gear upshift firm and positive.

allthrtl · 05-26-2003, 12:03 AM

Mike, why 88-92 700r4's.....I've heard this before but not heard what exactly the difference is.....

Another question, if I opt to go with a th350 in the short term, assuming a used 700 may be too much right now, what else will I have to change?? This will also give me the chance to try my hand at rebuilding the 700 myself... I just need to get the 83 road worthy asap..... Also, any idea what a used 700r4 will run??

79BIG10 · 05-26-2003, 03:29 AM

88-92 700r4's had the best inner parts and all the things that killed the earlier model had been fixed at this point. I think it was planetary gears, and other items that contributed to the bad run.

On the swap you may be able to get away with only needing to redrill the frame for your tranny crossmember but yor frame may already have it. You may need to re route your cooler lines and connect the kickdown cable. If you get a long tail TH350 (9") you can use it with the same drive shaft. Look here to see what I mean. http://www.tciauto.com/tech_info/trans_dims.htm

allthrtl · 05-26-2003, 05:21 PM

FYI.... TV cable adjustment didn't help a bit.... Worth a shot though....

05-24-2003, 08:07 PM	#1
allthrtl Available for Adoption Join Date: May 2003 Location: Lubbock Tx Posts: 177	Tranny Help.... The 83 swb I just bought has some tranny problems....It has a 700r4 behind a stock 305.... You put the selector in "D"rive and accellerate as normal...takes off fine, shifts to second (kinda hard but otherwise normal) but when it shifts to 3rd it starts slipping usually....If your going slow it will hold for a little before it starts slipping bad....You can manually put it back into 2nd and it will do ok..... I did notice that if you put it in 3rd, and it held, if you slow down to a stop and take off again, it jeks badly and make some very bad noises, clink, clank, clunk.....I noticed the level was a little low and added Trans-X, but it didn't seem to help after driving it around, slowly for about 10-15 miles.... Do any of you transmission smart fella's have any ideas.... I don't know crap about trannies so I'm sure I will end up at a shop, but if it sound catostraphic, I might start looking for a good used tranny from the wrecking yards and save paying the mechanics a bunch of money..... Thanks in advance.... It doesn't do this.....

05-24-2003, 08:20 PM	#2
swervin ervin You get what you pay for Join Date: Dec 1999 Location: Cherryville, NC Posts: 4,798	Yep, sounds as though it is going to the tranny graveyard. Find a 700R4 out of a 88 thru 92 truck. __________________ Mike 1985 Chevy C-10

05-24-2003, 08:29 PM	#3
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,310	sounds like a tranny problem that i had once soon the whole tranny is gonna go bang and you wont have any forward gears. i am not sure what went in there but for sure yiou need a total rebuild keep carrying those tow truck numbers with ya lol __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

05-24-2003, 09:03 PM	#4
boataddict26 Registered User Join Date: Mar 2003 Location: North Central Florida Posts: 726	Me and my dad just rebuilt his 700r4 outa his 91 Chevy. They are a pain but it can be done!! __________________ 1978 Chevy C10 Currently under resto. 350 Getting face lift. .060, JEpistons, Modify heads. More will come with money.

05-25-2003, 01:02 AM	#5
gchemist BAD BOW-Silverado XST Join Date: May 2000 Location: Senior Member from Austin, TX Posts: 6,431	Have you checked the TV cable settings? It's amazing how many 700R4s have the TV cable out of adjustment. Does your converter lock up in third? My 83 does. I like it. Makes the 4th gear upshift firm and positive. __________________ Gerardo a.k.a. Mad Chemist Silverado XST videos

05-26-2003, 12:03 AM	#6
allthrtl Available for Adoption Join Date: May 2003 Location: Lubbock Tx Posts: 177	Mike, why 88-92 700r4's.....I've heard this before but not heard what exactly the difference is..... Another question, if I opt to go with a th350 in the short term, assuming a used 700 may be too much right now, what else will I have to change?? This will also give me the chance to try my hand at rebuilding the 700 myself... I just need to get the 83 road worthy asap..... Also, any idea what a used 700r4 will run??

05-26-2003, 03:29 AM	#7
79BIG10 I'm back with 2nd truck! Join Date: Feb 2002 Location: Texas Posts: 3,774	88-92 700r4's had the best inner parts and all the things that killed the earlier model had been fixed at this point. I think it was planetary gears, and other items that contributed to the bad run. On the swap you may be able to get away with only needing to redrill the frame for your tranny crossmember but yor frame may already have it. You may need to re route your cooler lines and connect the kickdown cable. If you get a long tail TH350 (9") you can use it with the same drive shaft. Look here to see what I mean. http://www.tciauto.com/tech_info/trans_dims.htm __________________ 1979 Chevrolet Bonanza Big10 "Tootsie Roll" 1985 Chevrolet Silverado (wife's) Member of the Southern Bowties Club "Don't underestimate how sexy a fat man who drinks to excess can be." Homer Simpson

05-26-2003, 05:21 PM	#8
allthrtl Available for Adoption Join Date: May 2003 Location: Lubbock Tx Posts: 177	FYI.... TV cable adjustment didn't help a bit.... Worth a shot though.... __________________ 1983 C10 SWB 2001 Silverado SWB 1995 Corvette



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