Lock Up on trans. - The 1947 - Present Chevrolet & GMC Truck Message Board Network

grs · 08-09-2013, 08:48 PM

I may buy a 63 with a 700R4 trans. The seller says the lock up will kick out and kick in while driving. Is this normal?

grs · 08-09-2013, 08:54 PM

Are BowTie trasmissions any good? And what other companies rebuild them?

Irishbleueyes · 08-09-2013, 08:55 PM

At cruise speed? Need more info.. its not normal at cruise. It locks up at cruise speed and then unlocks when you accelerate or tap the brake pedal. Does it have an automatic lock up? Some of them have manual locking.. Get more info

Irishbleueyes · 08-09-2013, 08:57 PM

Quote:

Originally Posted by grs

Are BowTie trasmissions any good? And what other companies rebuild them?

Everybody rebuilds them, very common. However Bowtie overdrives does a xlnt job. Read the info on their site and compare..
http://www.bowtieoverdrives.com/cata...SUBCAT&CATID=B

grs · 08-09-2013, 09:15 PM

What can cause the trans lock up to kick in and out? It kicks in and out of overdrive. And are BowTie transmissions any good? And who else rebuilds them?

grs · 08-09-2013, 09:20 PM

Quote:

Originally Posted by Irishbleueyes

Everybody rebuilds them, very common. However Bowtie overdrives does a xlnt job. Read the info on their site and compare..
http://www.bowtieoverdrives.com/cata...SUBCAT&CATID=B

Yea I know a lot of shops rebuild them , but I don't know a good shop. I live in Roanoke, Tx. I just moved here from Joliet,IL. Thanks.

grs · 08-09-2013, 09:25 PM

Quote:

Originally Posted by Irishbleueyes

At cruise speed? Need more info.. its not normal at cruise. It locks up at cruise speed and then unlocks when you accelerate or tap the brake pedal. Does it have an automatic lock up? Some of them have manual locking.. Get more info

Thanks. I have not bought the truck yet. I was getting info to see if I should buy it or not. Maybe if I can get for $2,000 less that would cover a new trans plus labor. What is automatic, and manual lock up?

**Chevy Fleetside** · 08-09-2013, 10:38 PM

I wire mine up to a switch and lock it myself.

tincan1966 · 08-10-2013, 07:42 AM

I would bet that the TV cable is not adjusted properly, as they are very particular in how they are set. Must be correct or trans failure can occur. Improper setting will cause it to seem very touchy and lock in/lock out with very little throttle movement.

Most will call it a "kick down" cable like on an old TH350 trans, but it is a throttle valve cable which controls fluid pressure inside the trans. Adjustment is critical to trans life.
Most any trans shop can adjust it for you, or you can search the web or here and find info. It is not complicated to do, just take your time and follow instructions.

grs · 08-10-2013, 08:29 AM

Thanks everyone for the info.

08-09-2013, 08:48 PM	#1
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	Lock Up on trans. I may buy a 63 with a 700R4 trans. The seller says the lock up will kick out and kick in while driving. Is this normal?

08-09-2013, 08:54 PM	#2
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	BowTie transmissions Are BowTie trasmissions any good? And what other companies rebuild them?

08-09-2013, 08:55 PM	#3
Irishbleueyes Registered User Join Date: Apr 2012 Location: Solvang, Ca 93463 Posts: 323	Re: Lock Up on trans. At cruise speed? Need more info.. its not normal at cruise. It locks up at cruise speed and then unlocks when you accelerate or tap the brake pedal. Does it have an automatic lock up? Some of them have manual locking.. Get more info

08-09-2013, 09:15 PM	#5
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	700R4 lock up What can cause the trans lock up to kick in and out? It kicks in and out of overdrive. And are BowTie transmissions any good? And who else rebuilds them?

08-09-2013, 10:38 PM	#8
Chevy Fleetside Registered User Join Date: Sep 2006 Location: San Francisco Posts: 4,782	Re: Lock Up on trans. I wire mine up to a switch and lock it myself. __________________ "A man and his truck, what a beautiful thing" 65 Short Fleetside BBC 65 Long Fleetside 283 3 on the tree for now. my build thread http://www.67-72chevytrucks.com/vboa...d.php?t=259536

08-10-2013, 07:42 AM	#9
tincan1966 Registered User Join Date: Oct 2010 Location: Independence,KS Posts: 1,477	Re: Lock Up on trans. I would bet that the TV cable is not adjusted properly, as they are very particular in how they are set. Must be correct or trans failure can occur. Improper setting will cause it to seem very touchy and lock in/lock out with very little throttle movement. Most will call it a "kick down" cable like on an old TH350 trans, but it is a throttle valve cable which controls fluid pressure inside the trans. Adjustment is critical to trans life. Most any trans shop can adjust it for you, or you can search the web or here and find info. It is not complicated to do, just take your time and follow instructions.

08-10-2013, 08:29 AM	#10
grs Registered User Join Date: Jan 2010 Location: Roanoke, Tx. Posts: 1,561	Re: Lock Up on trans. Thanks everyone for the info.

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