Write-Up: Transmission Fluid Change

[Stevenredx]

Source: Customtacos.com

Original author: XRobber

I have:

• never been able to mash into 2nd gear at a high RPM
• 11K miles on the truck, and it is supercharged
• not gone to the track, because I can not hit 2nd gear without babying it

Well, low and behold, I heard rumors about people changing the fluid to Redline MT-90, and problems going away. So I bought 3 quarts of Redline MT-90 from Summit (local stores near me don't carry it). My cost was $32.00 with shipping.

Under the truck, there is a drain plug right at the bottom of the tranny. It takes 15/16" socket:

Crack it open, and get your oil pan ready to catch it.
Careful, it is easy to make a mess, it does not drain very smoothly... it kinda goes glub glub glub till its empty.

Then look about this on the driver's side of the tranny, you will find the fill plug :

remove this plug and get ready to fill....
Now...
Filling is the tricky part of this job...
Tom and I did it this way...
We fitted the quart with a rubber hose.
then duct taped a smaller host into that one the smaller hose fits right into the hole in the tranny).
heres a pic:

after we made that one, we took out the small hose and redid it.
Same way, just put a much longer small hose in it.
Tom stood in front of my truck under the hood, and ran the small hose down to me.
I stuck it in the hole (hehe)
and he started pouring.

This tranny holds 1.9 quarts.
We went ahead and dumped 2 whole quarts in.
When I removed the hose, the extra dribbled out, and I put the plug back in.


End Result:

I can get in 2nd gear at redline without a grind at all. The difference was 100% noticeable 2 minutes after I got on the road.

Edit -
I am not sure if its in my mind or not, but my reverse seems a little softer going in now too.

Added suggestions:
1. You can also fill it where the shifter mounts
2. Take the fill plug out before draining (helps with draining)

Last updated: 1/4/2020 by K2 (cleaned instructions and fixed photos)

 

[NITRAM-X]

thank you for the write up:top: , im going to have to do this sometime.

 

[NITRAM-X]

can you remove the fill plug before you drain to prevent the "glubbing":hmmmm2:

 

[Stevenredx]

can you remove the fill plug before you drain to prevent the "glubbing":hmmmm2:

Yeap... if you look at the bottom of the write up i added that to it :top:

Added suggestions:
1. You can also fill it where the shifter mounts
2. Take the fill plug out before draining (helps with draining)

 

[Matt's06]

Pulling the fill plug first helps a little, not much

 

[NITRAM-X]

Yeap... if you look at the bottom of the write up i added that to it

Added suggestions:
1. You can also fill it where the shifter mounts
2. Take the fill plug out before draining (helps with draining)

MY BAD DIDN'T READ THAT

 

[07XR808]

Just want to vouch for the Redline MT-90, this stuff is really good. I changed out the manual trans oil a couple days ago with only 5k on the odo and even though i had no problems with my transmission, i noticed an immediate difference. Gears feel smooth and like "butter", i would highly recommend changing out your stock oil to this one and also doing the recommended 30k change down the line as well back to this oil again

 

[XRobber]

Hell yeah, me too.

 

[SupraJunky101]

I used plain Redline 75w90, Feels Excellent. I noticed an immediate diffrence, in every gear. Nothing major but its enough to make the 1/2 hour spent doing it worth it.

 

[NITRAM-X]

so if you remove the shifter you can just pour it in there?:hmmmm2:

 

[Stevenredx]

so if you remove the shifter you can just pour it in there?:hmmmm2:

Yeap :top:

 

[Stevenredx]

I got mine changed a couple of days ago. There was a night and day difference with the redline. Others may not of had the same outcome but mine is 10 x better at shifting now and like Rob said, seems easier to get in reverse. I would also like to think Rob for the write-up, very easy to do but knowing what your getting into before hand always makes it that much easier :top:

 

[NITRAM-X]

I got mine changed a couple of days ago. There was a night and day difference with the redline. Others may not of had the same outcome but mine is 10 x better at shifting now and like Rob said, seems easier to get in reverse. I would also like to think Rob for the write-up, very easy to do but knowing what your getting into before hand always makes it that much easier :top:

WHERE DID YOU FIND THE REDLINE MT-90. NO ONE CARRIES IT AROUND HERE:dontknow: .

 

[Stevenredx]

WHERE DID YOU FIND THE REDLINE MT-90. NO ONE CARRIES IT AROUND HERE:dontknow: .

No one around here carries it either, so i ordered 3 qts from summit racing. Was on more door step in 3 days :top:

http://store.summitracing.com/partdetail.asp?autofilter=1&part=RED-50304&N=700+115&autoview=sku

 

[NITRAM-X]

did you fill from the shifter mount or the fill plug under the truck?

 

[Stevenredx]

The fill plug.. i got one of those funnels that has about a foot long tube on it from walmart and then added about 2 more feet to it and had my helper pour in two bottles of fluid (i was holding the tube in the tranny) until it started coming out of the fill plug hole :top:

 

[NITRAM-X]

The fill plug.. i got one of those funnels that has about a foot long tube on it from walmart and then added about 2 more feet to it and had my helper pour in two bottles of fluid (i was holding the tube in the tranny) until it started coming out of the fill plug hole :top:

sweet im going to order mine today and hopefully get it in before the meet on the 19.

 

[NITRAM-X]

Well I Went To The Local Truck Performance Shop To Order My Redline Mt-90 And The Owner Said Rather Than Changing The Mt-oil I Needed To Use An Additive. So I Bought A Pint Of A Local Mde Additive Called Mt-10!?. Holy Sh!t It Worked Miracles. Its Like This Bottle Converted My Truck To An Automatic. Shifts So Smooth And Easy.

 

[wshsbears]

Well I Went To The Local Truck Performance Shop To Order My Redline Mt-90 And The Owner Said Rather Than Changing The Mt-oil I Needed To Use An Additive. So I Bought A Pint Of A Local Mde Additive Called Mt-10!?. Holy Sh!t It Worked Miracles. Its Like This Bottle Converted My Truck To An Automatic. Shifts So Smooth And Easy.

dang, i may have to feel that next weekend.. i love the mt-90, but if theres something else i can use too, i still grind 2nd quite a bit. but that's b/c i slam second and third all day whenever im drivin :driver: :top:

 

[808skittles]

Pulling the fill plug first helps a little, not much

haha yeah it helps a LITTLE its more of a precaution... so you can for sure add fluid without taking the shifter off

heh

ive seen MANY trannys with LDSKJFSDLKFJSIGHSD:LKJFLSKJAIOFJ:SKLDJF fill plugs hahahaaaaa