Transmission Mods

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Apr 29, 2003 | 07:56 AM

Scotts99PSD

Thread Starter

New User

Joined: Apr 2003

Posts: 3

Likes: 0

Transmission Mods

I've just bought a 99 F350 CC Diesel dually, will pull a 24' tag along weighing around #8000 loaded. Any suggestions as to what I can do to my stock transmission to make it pull better and last longer? When should I change fluid? The Service Manual say 60,000 (I believe), but Chilton's says 30,000 ... I'm gonna change it, the mileage is right at 33,000, and while I was in there I was wondering about mods. I'm installing a Transmission Cooler this weekend, as well as a Trans Temp Gauge ... any other suggestions? Shift Kit?

Apr 29, 2003 | 06:11 PM

V10man

Logistics Pro

Joined: Feb 2000

Posts: 3,955

Likes: 50

From: Mesa

Transmission Mods

The simplest mod is the Sonnax valve and tricumulator spring kit. It will really firm up shifts. Ford recomends 30k intervals on changing the fluid. Don't forget to drain the TQ converter(it has a small plug) You should get about 95% of the fluid this way.

http://techtranstool.com/ Give these guys a call, I believe they sell both and will also give you some good info.

http://www.powerglide.com/parts/part.../96948-01K.htm

Apr 30, 2003 | 05:22 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,725

Likes: 2,651

From: SE Florida

Transmission Mods

You'll get more of the fluid changed if you follow the procedure in the Tech Article I posted last July. Go to the Tech Articles section.

Apr 30, 2003 | 06:04 PM

Monsta

Sit. Stay.

Joined: Oct 2001

Posts: 18,308

Likes: 20

From: Washington State

Transmission Mods

Check out the Diablo Transmission Valve here at the online store too!

Apr 30, 2003 | 10:24 PM

fd1506

Freshman User

Joined: Nov 2002

Posts: 40

Likes: 0

Transmission Mods

Try synthetic juice to!!

Apr 30, 2003 | 10:35 PM

SouthernDually

Elder User

Joined: Mar 2003

Posts: 872

Likes: 0

From: Oxford, Alabama

Transmission Mods

Ken I noticed that the Diablo trans modification is for the 01's. Do they make a mod kit for the 03"s or is it the same thing? Just asking. As usual I'm confused. nothing unusual but still just me.

May 1, 2003 | 05:33 PM

Mark Kovalsky

Frmr Ford Trans Engr

Joined: Aug 1999

Posts: 24,725

Likes: 2,651

From: SE Florida

Transmission Mods

Which transmission in your 2003? There were two. The first few months with the 7.3L had the 4R100, which was the same as 2002. After mid-November the engine changed to the 6.0L and the transmission to the TorqShift 5 speed automatic.

Nothing from a 4R100 will work in a TorqShift.