Transmission replacement

my 2001 Tundra with the 4.7 liter slips between first and second gear. Been this way for years and my mechanic advised to run it until it goes. Truck has 125k miles and is very well kept.
Thinking of finally fixing the tranny but not sure what’s the best option. After market ?
Rebuild factory tranny ? How much could this cost ?

 

Depends on budget imo

Reman with warranty
Salvage yard
Or rebuild

 

Thanks

 

The 03 04 Trannys are supposed to be better .Look for one of those used from a wrecked truck or something .

 

Reman’d with high quality parts inside. The transmission can be made better than new by the proper mechanic.

Also, the transmissions can be custom tailored to suit your driving style needs (sport, tow, etc.).

Probs run you $2k+/- for the transmission. Another $1-2k install.

 

Thanks for the advice.

 

Have you tried just changing the fluid a few times? It can't hurt at this point.

My brother has a 2000 F150. At 100k miles the tranny started slipping. He flushed all the old crap and put in the best fluid he could buy. It's almost at 300k now on the same transmission.

I'd be really surprised if your tranny is out at only 125k. That's almost unheard of with these trucks unless you screw them up Towing(or so I've read).

I would drop the pan and do the whole shebang. Get in new fluid and see what happens.

 

I’ll give the flush a shot. I think i did a general fluid change at 70k when the problem first popped up.
But in my world we only put 3-4K miles per year on the thing so it was a long time ago.

Thanks!

 

I replaced the transmission in my sons 2001 V8 4x2 with a 2004 model. All I had to do was use the original tail piece, then it was plug and play. I bought the 2004 tranny from OK auto parts for $300 and replaced it myself with the help of my brother and a transmission jack, took us 4-5 hours. Did this in December of 2018 and he totaled the truck in Jan 2019.

 

Now that’s a swift kick to the tender bits.

 

When you replaced your sons transmission, did you only have to replace the housing or did you have to change the shaft inside the tailpiece?

 

The lesson to be learned here is that transmission repairs cause serious accidents! Don't do it!

 

Try that suggestion! If you're about to replace it anyway, there's no harm in really tryin to clean it up first. Make sure you either do 3-4 drain and fills a few hundred miles apart, or get all the old fluid out through the trans cooler hose method. If you do one drain and fill it's only getting 4 of the 12 quarts out. Lots here, me included have had good luck with valvoline maxxlife trans fluid and it's relatively cheap.

After you do all that if it still slips try an additive like lubeguard or lucas

 

This is the cheapest and best bet. I just did this with my 02 Sequoia when the tranny blew up. The 00-02 transmission has a known weak planetary gear that fails and the tranny goes bye bye. You need to get a tranny out of an 03-04 Tundra/Sequoia (they are the same) which has fixed the planetary gear issue. 05-06 transmissions are different and not interchangeable with 00-04. Like said above just use your original tail shaft. I paid ~$500 for a transmission with transfer case from a ~100k mile 2004 Tundra and it was $800 to get it put in. You should be able to find a 2wd 03-04 tranny pretty cheap from a wrecking yard. I used https://www.car-part.com/ to search wrecking yards.