Need help with tranny in my '90 Blazer - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Hoods69BadBowTie · 07-29-2008, 10:29 PM

So my tranny has been shifting into reverse and drive hard. I went and checked the fluid it was good but nasty. I finally got money to change the filter and get some new tranny fluid. I go ahead and change it out. I could n't afford to pay to go get it flushed at a shop. Well the fluids perfect but its not wanting to shift down its rapping out the rpms before it wants to shift. Any help or ideas?? Thanx

Square84 · 07-29-2008, 11:27 PM

temp fix but try a bottle of trans x

rigon4 · 07-30-2008, 09:29 PM

sounds like its time for a new trans. most of the time if you have a weak trans you do not change the fluid because most of the time it hurts more than it helps

Hoods69BadBowTie · 07-30-2008, 09:51 PM

Quote:

Originally Posted by rigon4

sounds like its time for a new trans. most of the time if you have a weak trans you do not change the fluid because most of the time it hurts more than it helps

Yea thats what I was wondering if that kinda of happened here and I may have mad it worse. I forgot to add its the 700r4. Do you think a complete tranny flush would be worth it or just try some tranny fix in the bottle? Thats the only other thing I could think of.

*1974k5blazer* · 07-30-2008, 10:06 PM

i always say leav e your tranny fluid alone!!!!!!!!!!!!!!!!!!!!!!!!!!!! if your going to change it do it religiously every 15k if you dont and you just change it out of the blue its going to crap out on you, its something about the detergents in the new fluid that destroys your clutches inside the tranny!, your going to have to get a rebuilt and if you swap it out your self dont forget to flush your lines! and get a new torque converter do not use your old one!, I HAVE REBUILT 6 700R4'S AND I HATE THEM AND THINK THEY ARE HORRIBLE TRANSMISSIONS! I HATE THEM WITH A PASSION!!!!!!!!!!!!!!

Square84 · 07-30-2008, 11:07 PM

i got a 90 sub for $100 because the guy said the 700r4 was out. i took it the tranny shop because there was no overdrive and it would run up to about 4500 rpms before shifting then shift real hard. the guy at the tranny shop called the next day and said it was ready charged me $7 and said he put some trans x in it because the fluid had prolly never been changed and everything was varnished. he said drive it about 500 miles then change the fluid and filter. i did that and have now been driving the truck for 6 or so months without incedent.

07-29-2008, 10:29 PM	#1
Hoods69BadBowTie Chevys Kick A$$ Join Date: Jan 2005 Location: Zootown, MT Posts: 12,699	Need help with tranny in my '90 Blazer So my tranny has been shifting into reverse and drive hard. I went and checked the fluid it was good but nasty. I finally got money to change the filter and get some new tranny fluid. I go ahead and change it out. I could n't afford to pay to go get it flushed at a shop. Well the fluids perfect but its not wanting to shift down its rapping out the rpms before it wants to shift. Any help or ideas?? Thanx __________________ HOODS is what I answer too -'79, '77, '88 Pickup Sold, '85 Camaro, '83 T/A, '81,'83,'90 K5 Blazer All Sold -'79 3/4 ton "Big Yellow Bananna" Lifted 4spd. 39.5 TSL Swampers, The money Pit -'86 K5 Blazer Silverado 6.2 4" lift 35"s -'95 Ext. Cab Shorty 4" Tuff Country rolling 35" M/T's -'83 Monte Carlo T-Tops. 126,500 Original Miles -LATER I would rather push a Chevy then drive a ford!!

07-29-2008, 11:27 PM	#2
Square84 I don't think these pills work Join Date: Apr 2008 Location: burkburnett,Tx Posts: 626	Re: Need help with tranny in my '90 Blazer temp fix but try a bottle of trans x __________________ SQUARE84 90 SUBURBAN

07-30-2008, 09:29 PM	#3
rigon4 Registered User Join Date: Mar 2006 Location: east syracuse ny Posts: 371	Re: Need help with tranny in my '90 Blazer sounds like its time for a new trans. most of the time if you have a weak trans you do not change the fluid because most of the time it hurts more than it helps __________________ 1981 K-5 Blazer 2wd 1985 C-10 Short step 1988 C-10 Suburban

07-30-2008, 10:06 PM	#5
1974k5blazer Account Suspended Join Date: Dec 2007 Location: Queen Creek AZ Posts: 243	Re: Need help with tranny in my '90 Blazer i always say leav e your tranny fluid alone!!!!!!!!!!!!!!!!!!!!!!!!!!!! if your going to change it do it religiously every 15k if you dont and you just change it out of the blue its going to crap out on you, its something about the detergents in the new fluid that destroys your clutches inside the tranny!, your going to have to get a rebuilt and if you swap it out your self dont forget to flush your lines! and get a new torque converter do not use your old one!, I HAVE REBUILT 6 700R4'S AND I HATE THEM AND THINK THEY ARE HORRIBLE TRANSMISSIONS! I HATE THEM WITH A PASSION!!!!!!!!!!!!!! Last edited by 1974k5blazer; 07-30-2008 at 10:07 PM.

07-30-2008, 11:07 PM	#6
Square84 I don't think these pills work Join Date: Apr 2008 Location: burkburnett,Tx Posts: 626	Re: Need help with tranny in my '90 Blazer i got a 90 sub for $100 because the guy said the 700r4 was out. i took it the tranny shop because there was no overdrive and it would run up to about 4500 rpms before shifting then shift real hard. the guy at the tranny shop called the next day and said it was ready charged me $7 and said he put some trans x in it because the fluid had prolly never been changed and everything was varnished. he said drive it about 500 miles then change the fluid and filter. i did that and have now been driving the truck for 6 or so months without incedent. __________________ SQUARE84 90 SUBURBAN



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