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I'm in the middle of doing my first shift kit (transgo HD2). So far so good and it looks like a shift kit may have already been installed by the shop that rebuilt the transmission for the previous owner because the springs were orange when I replaced the boost valve with the Sonnax unit, a yellow one in the 4th accumulator, and 3 springs in the 2nd accumulator that lead me to posting this. The springs are as such with the piston on top, ***** up:
I currently really like how the car shifts except for the 2-3 that hits the limiter occasionally:
...so I'm also installing the Sonnax 2-3 HD valve with hole drill in valve body.
My Question: I've done a little research and I can't find anything on the 3 springs. Is it potentially damaging and I've just been lucky? It just seems excessive with the middle die spring that I can barely compress. Or should I go with the PBA setup (blue spring, spring seat, piston face down, orange spring)?
Those parts are from a Trans-Go SK 4L60E shift kit, The 2nd accumulator springs in the SK do have a tendency to break even when the correct springs are used in the corresponding housing per the instructions.
I like using stock springs......GM 24209794 "Purple" for the outside spring, And GM 8685656 "Pink" for the inner spring on a '99 F-Body. Set the band clearance fairly tight (Around .040"), .086"-.093" on the 2nd feed hole (With a CX Accumulator bushing & Vette servo).
Using the HD2 "over-under" springs with no shims is OK.
Are you using my kit here? Follow the instructions I sent or you are going to create problems. If not and you are going to use the HD2 over & under springs on the 2nd accumulator, then with a stock diameter torque converter drill the feed hole to .086 max. With 10" or smaller diameter torque converter drill the feed hole to .093" - .099" depending on the stall and how you drive. The best accumulator valve with this setup is "A" or "B" accumulator valve if you can get one, otherwise use what you have. With the regular Shift kit I like the "C" accumulator valve. If you are going to use this spring setup instead of the HD2, then for using the stock torque converter drill the 2nd feed to .076" with .080" max. With smaller TC same as above. The "CX" valve is very close to the "C" valve, so whichever one you can get should be ok. Late 1990's is where to find the "C" or "CX" valves. "B" accumulator valves are from 1993 - 1995 and almost all 1987 - 1992 700R4's. Feed hole for the 2-3 shift should be .110" for stock TC and .120" for smaller TC's.
Are you using my kit here? Follow the instructions I sent or you are going to create problems. If not and you are going to use the HD2 over & under springs on the 2nd accumulator, then with a stock diameter torque converter drill the feed hole to .086 max. With 10" or smaller diameter torque converter drill the feed hole to .093" - .099" depending on the stall and how you drive. The best accumulator valve with this setup is "A" or "B" accumulator valve if you can get one, otherwise use what you have. With the regular Shift kit I like the "C" accumulator valve. If you are going to use this spring setup instead of the HD2, then for using the stock torque converter drill the 2nd feed to .076" with .080" max. With smaller TC same as above. The "CX" valve is very close to the "C" valve, so whichever one you can get should be ok. Late 1990's is where to find the "C" or "CX" valves. "B" accumulator valves are from 1993 - 1995 and almost all 1987 - 1992 700R4's. Feed hole for the 2-3 shift should be .110" for stock TC and .120" for smaller TC's.
Thanks for the response PBA. I am not using your kit. I bought the transgo HD2, transgo separator plate, Sonnax HD 2-3, and Sonnax line booster. The transmission was rebuilt in 2014 by a shop for the previous owner. I did not realize there was already a shift kit in it or that it had DX and that is why I have questions.
I have an SS4000 in the car and it is mostly strip with very limited street. I currently have the 2-3 shift hole drilled to .101 and the rest @ .093 and am planning on using the HD2 2nd accumulator springs in your configuration. Should I open the 2-3 shift up to .120? Let me know if you see anything else. Thanks again
I prefer the Sonnax Accumulator Valve Train kit, 77777M-K (Heavy Vehicles) or 77777M-K (Light Vehicles) and use the White (Medium Shift) spring when used with the 093 Vette or Yellow (Light Shift) Spring when used with the Sonnax Billet 2nd Servo. If you have a higher stall, such as 3200 and above, the Pink (Firm Shift) Spring can be used.
lean is mean!! Jk. Those were the first passes after installing it and I'm glad I did. I noticed it lean too and the stock fuel pump filter/sock was black nasty. Replaced everything with the Racetronix pump kit with hotwire. Sits at 12.8-13.0 now at wot.
05-24-2017, 03:45 PM
4l60e 2nd Accumulator springs 
