Transmission problem - help please!
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Joined: Dec 2008
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Transmission problem - help please!
New to the forum - my question is regarding my transmission...I have an early 99 F-350 - spent $4K to upgrade the transmission due to a shuttering shift problem - problem is still there...it acts like it's shifting 3 times in a gear along with bouncing while towing. 
Anyone else had this problem? Anything else to check - computer, fuel pump, faulty transmission?
Thanks!
Anyone else had this problem? Anything else to check - computer, fuel pump, faulty transmission? Thanks!
Thread Starter
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New User
Joined: Dec 2008
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It has a triple convertor and all upgrades inside transmission. Need to find paper work to let you know what they did exactly. I have a 3 or 4 year old 80hp superchip programmer, large air intake, 4in high-flow exhaust from the turbo back. I would like to know what is a better chip for the truck and the cost. The tires are 35's if that matters.
Thanks for your help.
Thanks for your help.
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New User
Joined: Dec 2008
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When the chip is out -
I don't notice any funny shifting on the flats but if I'm going up a steep grade from drive to overdrive it does it a little bit.
When the chips is in -
I notice it in all gears but first gear.
Either in or out -
It doesn't hesitate when you accelerate slowly - only when you give it half throttle.
I don't notice any funny shifting on the flats but if I'm going up a steep grade from drive to overdrive it does it a little bit.
When the chips is in -
I notice it in all gears but first gear.
Either in or out -
It doesn't hesitate when you accelerate slowly - only when you give it half throttle.
Hook it, I'll pull it.
Joined: May 2007
Posts: 15,037
Likes: 4
From: Grand Lake, La.
I just took my old Superchip out of my truck because of the way it was shifting in Performance tune. I rather drive around in stock then have the Superchip in. Check your paper work on the trans build to see if they put some kind of Valve Body in it. Then call Jody at DP-TUNER and he will fix you up with what you want.
My Superchip is now doing the job it was designed to do. Holding down some paper work in my shop.
This post is not intended to offend anyone with a Superchip.
My Superchip is now doing the job it was designed to do. Holding down some paper work in my shop.
This post is not intended to offend anyone with a Superchip.
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Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
$4k?? Dang man -- you coulda had the ultimate in bulletproof trannys for that. The BTS is pretty much the top of the line, and you can't break it.
I'm thinking you have something sticking in the VB. When did you have it built? When I tore apart mine, I noticed that I could get the solenoids to stick if I wasn't careful. There are three shift solenoids 1-2, 2-3, and 3-4, so it's possible that the last two are sticking a little.
I'm thinking you have something sticking in the VB. When did you have it built? When I tore apart mine, I noticed that I could get the solenoids to stick if I wasn't careful. There are three shift solenoids 1-2, 2-3, and 3-4, so it's possible that the last two are sticking a little.
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Post Fiend
Joined: Feb 2007
Posts: 14,541
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From: Dallas-Ft. Worth
Thanks, Mark. Terminology issue -- I meant the actual valves accumulator VB, not the solenoids.... Sorry.
Postmaster
Joined: Oct 2005
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From: Northeast TN
When the chip is out -
I don't notice any funny shifting on the flats but if I'm going up a steep grade from drive to overdrive it does it a little bit.
When the chips is in -
I notice it in all gears but first gear.
Either in or out -
It doesn't hesitate when you accelerate slowly - only when you give it half throttle.
I don't notice any funny shifting on the flats but if I'm going up a steep grade from drive to overdrive it does it a little bit.
When the chips is in -
I notice it in all gears but first gear.
Either in or out -
It doesn't hesitate when you accelerate slowly - only when you give it half throttle.