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Discussion starter · #22 ·
Re: 200R4 Tramsmission

My rear end ratio is quite tall (3.08) and as you mentioned "It's gov RPM based, and 10 mph might be ok for a really steep rear gear". The RPM factor @ 10MPH is about 1150RPM @ and @ 15MPH is a about 1700 RPM. Maybe I need to change the springs in the govener??? As of yet I have not had a opportunity to check the exact shift points (MPH/RPM) under normal operation or WOT. I think I need to have both for all the shift points (1-2, 2-3, 3-4) plus what is happening with the the downshift from (4-3) to get a good grasp on the complete operation.
This 200R4 is a 1986 unit, and is not from a Monte Carlo SS or a Buick GN , so the valve body may be the factor in the shifting.
Thanks for all the good information, it make for good use of the old brain cells
 
Discussion starter · #23 ·
I am running a 3.08 rear axle. I don't think that the quick up shift with this rear axle ratio is normal. The 1st to 2nd are occurring at about 1200 RPM. The shift from 2nd to 3rd again is happening at about 1200 RPM which is very low RPM to up-shift. Shifting from 3rd to 4th happens at about 1500 RPM. All the above are at normal acceleration. It has been raining for the past few days and as a result of the weather I have not had an opportunity to check what the shift points are at WOT. I will also have to check where the down shift point is at WOT.
The 200R4 transmission is a 1986 unit, but it is not from a Monte Carlo of Buick GN. I am wondering if the problem is with the springs in the governor???
Any additional thoughts? I appreciate everyone’s thoughts and ideas, as it gets the old brain cells working.
 
#24 ·
It's been awhile - about 7 years or so - but I had to monkey around with my gov to get part throttle shift points where I wanted them. My problem was the opposite - a very late 1-2 upshift. I remember removing material from the governor weights to get it to shift sooner, and it worked.

There were a few different govs available for the 2004r. The Monte SS and GN had govs with not much material in the weights. The one I had (olds) had huge weights in comparison. I recall going for a happy medium between the 2 govs shown, but as I said it's been awhile.

Image


Image


I also found that whatever I did to alter PT shift points also altered WOT shift points. I just said screw it - I'll shift it manually when the need for speed arises.

It's Voodoo Science, and I don't really understand it all that well!
 
#25 ·
My 86 Monte SS trans upshifts in all the correct places with my 3.55 rear (monte's had a 3.73). The gov should be the same or very close to the GN one. The only issue is the lockup release to 4th doesn't happen at 35 mph and low throttle like it should. May be related to the gov. I plan on getting a vac switch to cut the power to the lockup, one of many tweaks I would like to do. For now, I just drop the shifter to 3rd when I am in that situation (which is quite a lot, lots of hilly 35 mph roads where I live :))
 
Discussion starter · #26 ·
As you mentioned "there are a few different govs available for the 2004r. The Monte SS and GN had govs with not much material in the weights. The on (olds) had huge weights in comparison" . and you went for a happy medium between the 2 govs. Do you re-call what govenor (year and model) you went for? You also mentioned that when you changed to Govenor it altered your WOT shift points. Were the shift point higher or lower? Thanks the more I hear it appears that I have to change the govenor on my transmission.
 
Discussion starter · #27 ·
Up-date. I have just completed a few runs on my Camaro checking the shift points compared to RPM.
Run #1
Normal acelleration WOT
1 -2 shift 10MPH @ 1150 RPM 30MPH @3400 RPM
2 -3 shift 18MPH @ 1150 RPM 55MPH @ 3550 RPM
3 - 4 shift 50 MPH @ 2000 RPM 75 MPH @ 3000RPM

Run #2
Normal acelleration WOT
1 -2 shift 12MPH @ 1300 RPM 30MPH @3400 RPM
2 -3 shift 22MPH @ 1300 RPM 55MPH @ 3550 RPM
3 - 4 shift 55 MPH @ 22500 RPM 75 MPH @ 3000RPM

Run #2
Normal acelleration WOT
1 -2 shift 10MPH @ 1150 RPM 30MPH @3400 RPM
2 -3 shift 22MPH @ 1300 RPM 55MPH @ 3550 RPM
3 - 4 shift 50 MPH @ 2000 RPM 75 MPH @ 3000RPM

With this info it appears that it may be the that I need to get a new govenor which has higher shift points??? What is the consciences out there. I am not too worried about the shift points at WOT but would like higher shift point at normal driving speeds.
Thanks
 
#28 ·
Before messing with the governor I'd try and and adjust the TV cable one click tighter at a time - it also has a definite effect on shift timing. My experience is that a tighter TV adjustment results in a later and firmer shift. The possible downside is that - depending on your TV bracketry, etc - WOT might pull it back out of adjustment.

(I'm not a trans expert - just relaying my experience)
 
Discussion starter · #30 ·
Re: 200R4 Tramsmission

I am still the process of determining actual make and model of 200R4 transmission.
The number on the tag on the tail shaft is: 117-2185HE114. these is also another H E on the tag.
I cannot find information on the above number/codes. The information I have is:
KZF Olds 442/Hurst
CZF 85-88 Monte Carlo SS
CRF 85-88 LG4 305 Monte Carlo/Grand Prix
BRF 86 - 87 GN/T-Type Turbo Regal
BQ 84-85 Gn?T - Type Turbo Regal
BR 83 Model T-Type
TAF 89 Pontiac Trans AM
OZ Hurst Olds
OM Olds 350 Diesel
OG Ids 307
BY V-6 252cCars
AA Cadillac
AP Cadillac
9TA 98 Pontiac Tranc Am
3OZ, 4OZ, 5OZ, 6KZ, 7KZ --83 -87 Hurst Olds/Cutlas 442 3.73
4CQ, 5 CQ, 6CZ, 7CZ, 8CZ -- 84 -88 monte Carlo SS 305 G 3.73
3BR, 4BQ, 5BQ, 6BR, 7BR, -- 83 - 87 Buick Regal Type -T GN/GNK

None of the above match the serial number /code on mt transmission. Can anyone shed some light on to what my 200R4 transmission is out of???? Thanks
 
#31 ·
I can't help you with the tag, but I bet if you use google you can find something. Even if you do find something, I don't think it means much unless you're sure the trans had never been apart. AFAIK, it's the valve body that sets these things apart. There was something "magical" about the BRF valve body that made it desireable. I'm pretty sure the rest of the internals are the same....

If your valve body hasn't been tanked or blasted, the model code is likely still painted on....here is a photo of mine.....307 Olds which absolutely screams performance. Good luck!

Image
 
Discussion starter · #32 ·
After doing some additional checking it appears that my 200r4 transmission 117-2185HE114 is form a 1984 Caprice, DeVille, Impala, LaSabre, Parrisienne W/v-8 305 L Canada.
If this is correct it would also explain the lower shift points due to being installed on a heavier lower performance vehicle in comparison to one installed in a Buick GN or Monte Carlo SS. What is the consciences?? Any confirmation on the HE transmission code?
Thanks
 
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Viking11
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