What Fluid to use for shift kit fitted 200-4R

zapp240

Active Member
A question for the transmission experts.... I have a recently purchased 87 GN that is in overall good shape. after recently getting a new TT 5.7 93 octane chip to replace a Red Armstrong 106 chip , have been noticing a bit of slipping in 3rd gear under acceleration. before i pull the cover and check old fluid and filter, need recommendations on a transmission fluid to replace with since i do not know what is currently in the tranny now. the converter is pictured below, has stock D5 number but possibly re stalled? the transmission shifts quick and hard and aggressive between 1st and second, inspection mechanic commented on more aggressive than stock. was easy on accelerations until i had the chip and fuel issues straightened out, but remember it pulling in 3rd gear harder with less slippage before. what fluid for a 200-r4 with a shift kit installed, thanks for suggestions.
 

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Opinions will vary but Dexron VI will likely be the popular choice.

What gas were you running with the Reds 106 chip?
 
Opinions will vary but Dexron VI will likely be the popular choice.

What gas were you running with the Reds 106 chip?


I ran the 3/4 tank of gas that the car arrived with from the dealer and never actually put any fuel in while the reds chip was installed so not sure if it was pump gas or had some octane boost added. actually, come to think of it, I installed the TT chip with the last of that gas installed, I think I should reset and relearn the chip proper with the 93/94 octane in the tank that the chip calls for.

Yeah, wasn't expecting to get rid of the slipping with a fluid change, but since i am taking the pan and filter down to inspect, will need to install the correct fluid and continue looking into possible causes. It is not a actually effecting anything now except under hard acceleration and in the top gear. after getting my foot of it, it settles in. I had an old 89 S10 that i thought the tranny was going and it was just the tv cable out of adjust so might also give that a try. t hanks guys
 
I ran the 3/4 tank of gas that the car arrived with from the dealer and never actually put any fuel in while the reds chip was installed so not sure if it was pump gas or had some octane boost added. actually, come to think of it, I installed the TT chip with the last of that gas installed, I think I should reset and relearn the chip proper with the 93/94 octane in the tank that the chip calls for.

Yeah, wasn't expecting to get rid of the slipping with a fluid change, but since i am taking the pan and filter down to inspect, will need to install the correct fluid and continue looking into possible causes. It is not a actually effecting anything now except under hard acceleration and in the top gear. after getting my foot of it, it settles in. I had an old 89 S10 that i thought the tranny was going and it was just the tv cable out of adjust so might also give that a try. t hanks guys

Name brand dex 6 is good as is amsoil supershift. No need to overthink the fluid type as there is
no magic fluid that will fix a wounded 3rd gear clutch pak assembly.

From the color of your torque converter you can tell that it has been out of the car, maybe restalled or maybe just refreshed when the trans was done.

You can almost count on the fact that the trans was either rebuilt incorrectly or if just a kit was installed
it does not have the correct set-up that a turbo regal 200r4 needs to have in order to survive.

There is a big difference in what a low power v8 car with 200r4 trans will get by with and what
the same trans in our cars needs to have.

There are many things that are unique to an original T/R 200r4 trans that rebuilders are not aware
of and in their zest to do a really good job and make the trans better they end up making it weaker
than it came from gm. I have seen many trans that were neutered by having all sorts of pressure regulation
system mods done, Improper stack up tolerances used during the build, valve bodies and servos modified
and unfortunately a lot of the time these Bad mods are difficult to undo.

The slipping 3rd gear will last a little if you keep the power turned down but dont count on it for long if you turn it up or start to drive it hard.

You Would be ahead of the game if you start to research a local to you Turbo Regal trans specialist who has a
good reputation on this forum and If you have no one near by you will likely have to either ship the trans or get the car to one somehow.

The tv cable adjustment is fairly simple, but from your description I can tell you are already screwed,,,,
Hits hard in second soft in 3rd. Any adjustment to firm up 3rd is going to make 2nd much harder as well.
Basically when you are under the hood and you move the throttle body to WOT as it gets near WOT you should see the TV cable bottom out and begin to flex the bracket just slightly as the tv cable runs out of room.....and you
should see this only during the last little bit of travel as the T_body goes fully open.
At this point drive the car and see how the part throttle shift timing is,,,you can adjust the cable 1 maybe 2
clicks tighter or looser from this setting but that is it.
a good indicator of correct adjustment is the trans will shift in OD with light throttle at 43-44 mph
+ or - a couple mph. If the trans does not want to shift into OD until 50 mph or higher, or if you need to lift
in order for it to shift the tv adjustment is too tight.

I have seen so many trans disasters over the years that cause the owners major grief. Hopefully yours can be sorted
out easily. HTH
 
Thanks Fastblackracing, good advice. It does actually shift hard into 2nd and a little quick as well, you might be spot on with the already adjusted tv cable, I will try and check it out. The car was originally from your neck of the woods when i bought it, Thomas Classics.
whats odd about the tranny is how hard it hits when coming to a stop, it bangs pretty hard from 2nd to 1st sometimes, not sure what that is all about.
 
Thanks Fastblackracing, good advice. It does actually shift hard into 2nd and a little quick as well, you might be spot on with the already adjusted tv cable, I will try and check it out. The car was originally from your neck of the woods when i bought it, Thomas Classics.
whats odd about the tranny is how hard it hits when coming to a stop, it bangs pretty hard from 2nd to 1st sometimes, not sure what that is all about.

The servo and 2nd accumulator along with the check ball and spacer plate configuration can all
cause exactly what you are describing with the 1-2 and 2-1. Are you still local?
 
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