Help diagnose my problem! - The 1947 - Present Chevrolet & GMC Truck Message Board Network

grayharville · 06-10-2010, 04:14 PM

hey yall, my mom said I could have her old truck if I can fix it. Its a 1990 extended cab longbed chevy, with a GMC clip, billet grill, flowmasters, 350, auto. the motor and tranny have both been swapped in at sometime, supposedly not too long ago, we arent sure as we bought the truck used. Anyways on to the problem, the tranny is stuck in first, you can rev it as high as you like and it wont shift out of first gear, reverse works fine. What could this be? help me out please? thanks in advance!

93Chevy4x4 · 06-10-2010, 05:31 PM

What kind of trans is in it? 700R4 or 4L60E? If it is a 700R4 there will be a cable running from your throttle plate down to the trans.

grayharville · 06-10-2010, 05:33 PM

uhh, 700r4... yep just went and checked. its the 700

93Chevy4x4 · 06-10-2010, 05:42 PM

Does the cable move freely? If it does then you have other problems another trans might be in order. The 700's are easy to diagnose if that cable is messed up no shift unless the trans is blown.

grayharville · 06-10-2010, 05:46 PM

im sure it does, ill go check. we've had problems with the governor before, could this be a possibility for the tranny not to shift? a bad governor?

ChevLoRay · 06-10-2010, 06:06 PM

Okay, let me see if I understand the BIG PICTURE.....your mom is GIVING you the truck, right? All you have to do it FIX it. So, let's see.....Oh, I'd get the transmission overhauled and drive it if everything else is working. You'd probably have $2K in the gearbox, which equates to a cheap ride.

This way, the transmission shop would be doing the diagnosis and the repairs and you'd have a warranty. Win-Win deal.

grayharville · 06-10-2010, 06:26 PM

yes, that is a win win deal, main problem is that i have dont have much money, so im just checking to see if it could be something simple, such as the governor, something I could fix myself, instead of putting it in a tranny shop and dropping 2000 dollars in it when i might only need a cheap part, ya know?

93Chevy4x4 · 06-10-2010, 07:28 PM

Buy a used trans and put it in yourself. Then save up for a new trans and have the shop install the new one. Trannys arent that hard to install just get a couple of your buddys to help to some lifting thats what I did.

grayharville · 06-10-2010, 11:44 PM

thats kinda what i figured i would wind up doing, we just got 8 inches of rain so itll be awhile!

06-10-2010, 04:14 PM	#1
grayharville ^^who I am^^ what I say> Join Date: Jun 2009 Location: Murchison, Tx Posts: 992	Help diagnose my problem! hey yall, my mom said I could have her old truck if I can fix it. Its a 1990 extended cab longbed chevy, with a GMC clip, billet grill, flowmasters, 350, auto. the motor and tranny have both been swapped in at sometime, supposedly not too long ago, we arent sure as we bought the truck used. Anyways on to the problem, the tranny is stuck in first, you can rev it as high as you like and it wont shift out of first gear, reverse works fine. What could this be? help me out please? thanks in advance! __________________ 70 chevy LWB 350/TH350 Barn find (AKA the 70) http://www.67-72chevytrucks.com/vboa...d.php?t=406364 East Tx Squares

06-10-2010, 05:31 PM	#2
93Chevy4x4 Registered User Join Date: Apr 2010 Location: E. Parsonsfield, Maine Posts: 54	Re: Help diagnose my problem! What kind of trans is in it? 700R4 or 4L60E? If it is a 700R4 there will be a cable running from your throttle plate down to the trans. __________________ -1993 Chevy 1500 2wd, reg. cab shortbed, V6, Dual Exhaust -1993 Chevy 1500 4x4, Reg. Cab, stepside, Currently doing a frame up. -1985 Chevy S-10, 4x4, 355, Tons of Extras. -1989 Chevy S-10 ex cab, V6, parts truck. -1995 GMC Jimmy 4x4, Vortec V6. -2008 Chevy Aveo.

06-10-2010, 05:33 PM	#3
grayharville ^^who I am^^ what I say> Join Date: Jun 2009 Location: Murchison, Tx Posts: 992	Re: Help diagnose my problem! uhh, 700r4... yep just went and checked. its the 700 __________________ 70 chevy LWB 350/TH350 Barn find (AKA the 70) http://www.67-72chevytrucks.com/vboa...d.php?t=406364 East Tx Squares Last edited by grayharville; 06-10-2010 at 05:35 PM.

06-10-2010, 05:42 PM	#4
93Chevy4x4 Registered User Join Date: Apr 2010 Location: E. Parsonsfield, Maine Posts: 54	Re: Help diagnose my problem! Does the cable move freely? If it does then you have other problems another trans might be in order. The 700's are easy to diagnose if that cable is messed up no shift unless the trans is blown. __________________ -1993 Chevy 1500 2wd, reg. cab shortbed, V6, Dual Exhaust -1993 Chevy 1500 4x4, Reg. Cab, stepside, Currently doing a frame up. -1985 Chevy S-10, 4x4, 355, Tons of Extras. -1989 Chevy S-10 ex cab, V6, parts truck. -1995 GMC Jimmy 4x4, Vortec V6. -2008 Chevy Aveo.

06-10-2010, 05:46 PM	#5
grayharville ^^who I am^^ what I say> Join Date: Jun 2009 Location: Murchison, Tx Posts: 992	Re: Help diagnose my problem! im sure it does, ill go check. we've had problems with the governor before, could this be a possibility for the tranny not to shift? a bad governor? __________________ 70 chevy LWB 350/TH350 Barn find (AKA the 70) http://www.67-72chevytrucks.com/vboa...d.php?t=406364 East Tx Squares

06-10-2010, 06:06 PM	#6
ChevLoRay Old Skool Club Join Date: Jun 2001 Location: Benton, AR "The Heart of Arkansas" Posts: 10,880	Re: Help diagnose my problem! Okay, let me see if I understand the BIG PICTURE.....your mom is GIVING you the truck, right? All you have to do it FIX it. So, let's see.....Oh, I'd get the transmission overhauled and drive it if everything else is working. You'd probably have $2K in the gearbox, which equates to a cheap ride. This way, the transmission shop would be doing the diagnosis and the repairs and you'd have a warranty. Win-Win deal. __________________ Member Nr. 2770 '96 GMC Sportside; 4.3/SLT - Daily driven....constantly needs washed. '69 C-10 SWB; 350/TH400 - in limbo The older I get, the better I was.

06-10-2010, 06:26 PM	#7
grayharville ^^who I am^^ what I say> Join Date: Jun 2009 Location: Murchison, Tx Posts: 992	Re: Help diagnose my problem! yes, that is a win win deal, main problem is that i have dont have much money, so im just checking to see if it could be something simple, such as the governor, something I could fix myself, instead of putting it in a tranny shop and dropping 2000 dollars in it when i might only need a cheap part, ya know? __________________ 70 chevy LWB 350/TH350 Barn find (AKA the 70) http://www.67-72chevytrucks.com/vboa...d.php?t=406364 East Tx Squares Last edited by grayharville; 06-10-2010 at 06:26 PM.

06-10-2010, 07:28 PM	#8
93Chevy4x4 Registered User Join Date: Apr 2010 Location: E. Parsonsfield, Maine Posts: 54	Re: Help diagnose my problem! Buy a used trans and put it in yourself. Then save up for a new trans and have the shop install the new one. Trannys arent that hard to install just get a couple of your buddys to help to some lifting thats what I did. __________________ -1993 Chevy 1500 2wd, reg. cab shortbed, V6, Dual Exhaust -1993 Chevy 1500 4x4, Reg. Cab, stepside, Currently doing a frame up. -1985 Chevy S-10, 4x4, 355, Tons of Extras. -1989 Chevy S-10 ex cab, V6, parts truck. -1995 GMC Jimmy 4x4, Vortec V6. -2008 Chevy Aveo.

06-10-2010, 11:44 PM	#9
grayharville ^^who I am^^ what I say> Join Date: Jun 2009 Location: Murchison, Tx Posts: 992	Re: Help diagnose my problem! thats kinda what i figured i would wind up doing, we just got 8 inches of rain so itll be awhile! __________________ 70 chevy LWB 350/TH350 Barn find (AKA the 70) http://www.67-72chevytrucks.com/vboa...d.php?t=406364 East Tx Squares



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