What did I do to my tranny? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Heavy87Chevy · 02-23-2011, 12:35 PM

Hey guys,

So I put my truck into a ditch, if you could even call it that, a week or so.. I was able to get out in 4wd but when I was back on the road she wouldn't shift out of 1st gear.. I checked my transmission fluid which was very low & filled it up, unfortunately that didn't help at all. Its an '87 K10 with a rebuilt 350 & 700R4 trans. I don't know much about transmissions, or these old trucks in general so if anyone can help me out before I just get my wallet out & take it to my old man's transmission guy I would greatly appreciate it!

Jay146992 · 02-23-2011, 12:50 PM

Did you check the throttle valve cable?

Toxic Redline · 02-23-2011, 01:29 PM

You broke it

csb#356 · 02-23-2011, 01:54 PM

I'm thinkin you knocked somethin loose like the tv cable because putting it in 4 wheel drive and backing up doesn't ruin a transmission unless you were really spinnin the tires for a while with low fluid. But just to make sure, you dont still have it in low do ya. Any serious leaks that you can see? How does the fluid smell?

monte0185 · 02-23-2011, 03:30 PM

You broke the governor gear. been there done that!! On the side of the tranny there is a circular cover that's held on by a clip or just pressed in depending on the tranny. Its about 2.5 inches in diameter. Pull it off with a flathead screwdriver and behing it is a metal t looking thing that will pull out and the t part kinda has wings on it i guess you could call them. anyway if you pull it out there is a nylon gear on the end of it and i bet ya money its broke. I used to keep a spare one in my tool box when i was racing. GM parts houses carry the gears.

Heavy87Chevy · 02-23-2011, 03:34 PM

Quote:

Originally Posted by csb#356

I'm thinkin you knocked somethin loose like the tv cable because putting it in 4 wheel drive and backing up doesn't ruin a transmission unless you were really spinnin the tires for a while with low fluid. But just to make sure, you dont still have it in low do ya. Any serious leaks that you can see? How does the fluid smell?

I checked for leaks & couldn't see any. I filled it up & went for a short slow drive to see if I could see any fluid after. The fluid looks fine. I haven't really checked anything else because I don't even know where to begin looking..

Thanks Monte, I'll look into that asap

monte0185 · 02-23-2011, 03:36 PM

Quote:

Originally Posted by Heavy87Chevy

I checked for leaks & couldn't see any. I filled it up & went for a short slow drive to see if I could see any fluid after. The fluid looks fine. I haven't really checked anything else because I don't even know where to begin looking..

Thanks Monte, I'll look into that asap

I added some pics.

silvereagle07 · 02-23-2011, 03:44 PM

My 4x4 is doing the same thing. I'll have to check that out this weekend.

krue · 02-23-2011, 03:49 PM

What tranny you running? If it's a 350, make sure the vacuum line going to the shift solenoid on the right side didn't come loose. I've had that happen a couple of times to me.

Heavy87Chevy · 02-23-2011, 03:59 PM

Quote:

Originally Posted by monte0185

I added some pics.

I just took that out, looks fine though. The plastic piece on the end appears fine.

Quote:

Originally Posted by krue

What tranny you running? If it's a 350, make sure the vacuum line going to the shift solenoid on the right side didn't come loose. I've had that happen a couple of times to me.

The 700r4..

monte0185 · 02-23-2011, 04:08 PM

Quote:

Originally Posted by Heavy87Chevy

I just took that out, looks fine though. The plastic piece on the end appears fine.

The 700r4..

Then I would say you have something hung in the valve body. I'm not an expert at trannys though so don't take my work for it. I just know the things Ive ran across. Everything else i leave to my tranny person to take care of. LOL

Heavy87Chevy · 02-23-2011, 04:29 PM

Quote:

Originally Posted by monte0185

Then I would say you have something hung in the valve body. I'm not an expert at trannys though so don't take my work for it. I just know the things Ive ran across. Everything else i leave to my tranny person to take care of. LOL

Haha ok, thanks for the help anyway, I appreciate it! I'll probably be taking it to my guy if I can't figure it out soon. I still need to check my tv cable I guess

csb#356 · 02-23-2011, 06:05 PM

Yeah i dont think the 700r4 uses a vacuum modulator to shift i believe it is electric so maybe check wire connections? I'm sure someone will correct me on this.

Actually on second thought i think maybe its the tv cable that controls the shifts. Don't know for sure haven't owned a 700

Heavy87Chevy · 02-24-2011, 12:41 AM

Quote:

Originally Posted by csb#356

Yeah i dont think the 700r4 uses a vacuum modulator to shift i believe it is electric so maybe check wire connections? I'm sure someone will correct me on this.

Actually on second thought i think maybe its the tv cable that controls the shifts. Don't know for sure haven't owned a 700

I think its the tv cable, a few people have told me to check that.. I thought I did but now I'm wondering if I was checking something else.

02-23-2011, 12:35 PM	#1
Heavy87Chevy Registered User Join Date: Dec 2010 Location: Peterborough, Ontario Posts: 54	What did I do to my tranny? Hey guys, So I put my truck into a ditch, if you could even call it that, a week or so.. I was able to get out in 4wd but when I was back on the road she wouldn't shift out of 1st gear.. I checked my transmission fluid which was very low & filled it up, unfortunately that didn't help at all. Its an '87 K10 with a rebuilt 350 & 700R4 trans. I don't know much about transmissions, or these old trucks in general so if anyone can help me out before I just get my wallet out & take it to my old man's transmission guy I would greatly appreciate it!

02-23-2011, 12:50 PM	#2
Jay146992 Registered User Join Date: Sep 2010 Location: Warren Ohio Posts: 27	Re: What did I do to my tranny? Did you check the throttle valve cable?

02-23-2011, 01:54 PM	#4
csb#356 Registered User Join Date: May 2009 Location: Pinehurst, Idaho Posts: 311	Re: What did I do to my tranny? I'm thinkin you knocked somethin loose like the tv cable because putting it in 4 wheel drive and backing up doesn't ruin a transmission unless you were really spinnin the tires for a while with low fluid. But just to make sure, you dont still have it in low do ya. Any serious leaks that you can see? How does the fluid smell?

02-23-2011, 03:30 PM	#5
monte0185 Registered User Join Date: Oct 2008 Location: Brighton, TN Posts: 1,267	Re: What did I do to my tranny? You broke the governor gear. been there done that!! On the side of the tranny there is a circular cover that's held on by a clip or just pressed in depending on the tranny. Its about 2.5 inches in diameter. Pull it off with a flathead screwdriver and behing it is a metal t looking thing that will pull out and the t part kinda has wings on it i guess you could call them. anyway if you pull it out there is a nylon gear on the end of it and i bet ya money its broke. I used to keep a spare one in my tool box when i was racing. GM parts houses carry the gears. Attached Images __________________ A computer once beat me at chess, but it was no match for me at kick boxing. Duct tape is like the force. It has a light side, a dark side, and it holds the world together. Last edited by monte0185; 02-23-2011 at 03:35 PM.

02-23-2011, 03:44 PM	#8
silvereagle07 Registered User Join Date: Sep 2008 Location: Bailey, NC Posts: 2,462	Re: What did I do to my tranny? My 4x4 is doing the same thing. I'll have to check that out this weekend. __________________ Jeramy '84 GMC project truck '85 Chevy 4X4 SOLD '07 Chevy Trailblazer SS 5th Annual SHPHC Car/Truck Show Pics http://67-72chevytrucks.com/vboard/s...d.php?t=543605 UPDATED PICS! CHECK 'EM OUT

02-23-2011, 01:29 PM	#3
Toxic Redline Registered User Join Date: May 2010 Location: Ogden, Utah Posts: 219	Re: What did I do to my tranny? You broke it __________________ 84 K20 Long Box W.I.P 78 Burb - parts now [Rolled] 68 c20 dump bed WHEN IN DOUBT--- FLOOR IT

02-23-2011, 03:49 PM	#9
krue Designated A-hole! Join Date: Mar 2003 Location: South Mississippi Posts: 36,450	Re: What did I do to my tranny? What tranny you running? If it's a 350, make sure the vacuum line going to the shift solenoid on the right side didn't come loose. I've had that happen a couple of times to me. __________________ "If it ain't broke, fix it 'til it is!" Being stupid ain't illegal. We're Still Debt Free Except for the House!!! www.daveramsey.com 70 GMC SWB Stepside project "Green Booger" soon to be 6.0l/4l80e 93 S-10 "Poppaw's Truck"

02-23-2011, 06:05 PM	#13
csb#356 Registered User Join Date: May 2009 Location: Pinehurst, Idaho Posts: 311	Re: What did I do to my tranny? Yeah i dont think the 700r4 uses a vacuum modulator to shift i believe it is electric so maybe check wire connections? I'm sure someone will correct me on this. Actually on second thought i think maybe its the tv cable that controls the shifts. Don't know for sure haven't owned a 700



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