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#1 |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Asap! Why won't my truck shift out of 2nd!??
I was driving for about an hour at 90 kmh and all of a sudden after going up a hill, my truck wouldn't shift back up. I checked the tranny fluid which was low & stopped, put in 2L of fluid which made no difference, but it says the level is good on the dipstick. Wtf is happening? I've put maybe 5k km on the rebuilt 700r4. I'm stuck an hour from home now unsure if it's safe to drive home at 50km/h. It won't shift out 2nd at all & the 1-2 shift is hard. I had this problem before the trans got rebuilt
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#2 |
Registered User
Join Date: Oct 2011
Location: Matthews, NC
Posts: 129
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Re: Asap! Why won't my truck shift out of 2nd!??
I would NOT drive home if i was you man, but im no good on 700r4's! hopefully someone else will chime in i know how urgent it is!
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#3 |
Gentleman Jim owner x2
![]() Join Date: Oct 2010
Location: West Des Moines, IA
Posts: 464
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Re: Asap! Why won't my truck shift out of 2nd!??
Sounds like something is sticking inside your transmission. Don't know what else to tell you...
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1975 GMC Gentleman Jim #1 -357 / 700r4 1975 GMC Gentleman Jim #2 -350 / TH350 |
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#4 |
1965 Chevy C10, 2005 4.8L/4l60
![]() Join Date: Aug 2004
Location: DFW Texas
Posts: 8,543
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Re: Asap! Why won't my truck shift out of 2nd!??
Who rebuilt it? a shop? call them and ask what they want you to do.
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Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 ![]() ![]() ![]() support our troops! |
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#5 |
Registered User
Join Date: Sep 2010
Location: Kirkland, WA
Posts: 241
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Re: Asap! Why won't my truck shift out of 2nd!??
Do 700R4s use vacuum to determine upshifts like TH350s do? If so, it could be a simple problem with the vacuum line coming off.
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#6 |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Asap! Why won't my truck shift out of 2nd!??
while the truck is running pull the throttle valve cable in and out and see if it may be stuck take a look here http://www.transmissioncenter.net/700r4.htm
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#7 |
Registered User
Join Date: Oct 2011
Location: Emory TX
Posts: 900
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Re: Asap! Why won't my truck shift out of 2nd!??
Throttle valve is probably stuck. Stomp the gas pedal to the floor three or four times and see it will free it up.
I have trhown them in park for just a second going 15-20 mph, the vibration of the parking pawl will some times free the valve, and it will not go into park going that fast. What did the fluid look and smell like? |
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#8 | |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Asap! Why won't my truck shift out of 2nd!??
Quote:
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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#9 |
Registered User
Join Date: Oct 2011
Location: Emory TX
Posts: 900
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Re: Asap! Why won't my truck shift out of 2nd!??
Iv'e done it many times and never hurt anything, not saying that it can't. If he's stuck and wants to get home give it a try. But normally unless the converter is coming apart and pumping metal in it the stomp method will work.
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#10 |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Asap! Why won't my truck shift out of 2nd!??
the stomp method is prefered when driving other wise its park the truck and while its idleing actuate the t.v. valve really fast alot of times and see if that works
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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#11 |
Registered User
Join Date: Oct 2010
Location: Largo Florida
Posts: 632
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Re: Asap! Why won't my truck shift out of 2nd!??
or you could just go under the hood, disconnect the TV cable end off the throttle cable, and then pull it all the way out then let it snap back. That is the way Trans-go told me to check for a stuck TV valve.
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Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle." |
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#12 | |
78K & 79C Jimmys
Join Date: Nov 2009
Location: Ottawa Ont CANADA
Posts: 7,901
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Re: Asap! Why won't my truck shift out of 2nd!??
Quote:
stomp yes
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John 1978 GMCJimmy4X4-350/203 1979 GMCJimmy4X2-305/350 |
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#13 |
Registered User
Join Date: Aug 2011
Location: Winnsboro TX
Posts: 234
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Re: Asap! Why won't my truck shift out of 2nd!??
Try disconnecting the TV cable and driving and see how it shifts (if at all). Don't drive it far, just enough to see if it'll shift. Then reconnect. Not that you want to, put you could always drop the pan and see if there's a more than normal amount of metal shavings in there. Would also give you a chance to maybe look at the valve.
Don't want to add insult to injury, but my 700r4 did the same thing about a year ago...it was in the shop the next day getting rebuilt. If a shop rebuilt it, definately give them a call. Even though mines out of warranty, he told me to always call him if something wasn't right and he'd make it right.
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1st - '68 long bed 2nd - '81 SWB Now - '86 SWB, Edelbrock 1406/stock 350/700r4 |
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#14 |
Registered User
Join Date: Aug 2011
Location: rossville il
Posts: 7
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Re: Asap! Why won't my truck shift out of 2nd!??
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#15 |
Registered User
Join Date: Aug 2011
Location: rossville il
Posts: 7
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Re: Asap! Why won't my truck shift out of 2nd!??
best bet...go with a different tranny 700r4 are junk..only good thing is they have overdrive...
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#16 | |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Asap! Why won't my truck shift out of 2nd!??
Quote:
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#17 |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Asap! Why won't my truck shift out of 2nd!??
junk when stock yes, very nice when built right not that silly corvette servo and shift kit crap that supposedly handles 450hp like most shops (90%) advertise, they are still stock and even 300hp can kill them when you flog em
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#18 |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Asap! Why won't my truck shift out of 2nd!??
Its got a corvette servo & a shift kit.. they were both in it when i got it. If so many people advertise it & do it, then why is it junk? I'm not disagreeing, just asking because you probably know more than I! They are still 'stock' with these modifications?
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#19 | |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Asap! Why won't my truck shift out of 2nd!??
Quote:
http://www.transmissioncenter.net/700MegaRaptor.htm the problem is that trans shops rebuild a trans and put a shift kit $75 and a corvette servo $ 25 and sell it for upwards of $1500 dollars when its really no better than a stock trans that you can do all this to yourself
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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#20 |
Registered User
Join Date: Jun 2008
Location: Lubbock, TX
Posts: 2,047
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Re: Asap! Why won't my truck shift out of 2nd!??
Had a problem similar to this with a 90's van. Builder recommended I hold it in first manually to about 3500 revs and as revs were climbing, slip my foot off of the accelerator and manually shift at the same time. Cleared mine right up.
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#21 |
Registered User
Join Date: Dec 2010
Location: Peterborough, Ontario
Posts: 54
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Re: Asap! Why won't my truck shift out of 2nd!??
Well if any of you recall this thread, I FINALLY today got a call to say my trucks ready.. The guy told me that the 3-4 valve was burnt & stuck so he replaced it & put a new belt in. So I'm going to pick it up in an hour or so. I am just a bit concerned that it may recur.. This was the 2nd time that the same problem happened & I don't think theres anything we can do to prevent it from happening again..
Anyhow, I'm excited! I missed my baby & tomorrow my old man & I are finishing framing & starting the roof on our new garage so I'll be able to fix er up indoors over the winter ![]() |
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#22 | |
Registered User
Join Date: Jul 2009
Location: washington
Posts: 4,178
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Re: Asap! Why won't my truck shift out of 2nd!??
Quote:
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377 sbc thumpr cam autogear m23 muncie 3:73 Detroit trutrac 3''spintech prostreet mufflers xpipe 1 3/4 headers build thread !http://67-72chevytrucks.com/vboard/s...d.php?t=577217 Iroc gauge threadhttp://67-72chevytrucks.com/vboard/s...d.php?t=554511 |
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#23 | |
Registered User
Join Date: Nov 2011
Location: Chicago, IL
Posts: 321
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Re: Asap! Why won't my truck shift out of 2nd!??
Quote:
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