I just bought a 70 GS 455 4 speed car and was interested in comparing it's sloan docs to other 70 455 4 speed cars that are owned by others of this website Anyone have a sloan documented or Wayne Roberts documented 70 GS 455 4 speed car? Email me direct at rjohns@sprint.ca or post here. Thanks Rich
I have sloan documentation for a 70 GS 455 4 speed car that I owned a few years back. It was the rustiest pile of Cr@p I've ever laid eyes on. The original owner told me it had something like 350K on it. I sold the car, but part of me wishes I still had it. What do you want to see? Bob
Thanks for responding Bob What was the factory colour combo and options on that car? Did it have a 3:42 open or Limited slip rear axle? Let me know Rich
Hi Guys, Rich....The convertible pictured in my avatar is a Sloan documented '70 GS455 4-speed convertible. What would you like to know? I have the paperwork Sloan (dated Aug 2001) sent me right here by the computer. Best $25.00 I had spent in a LONG time!:TU:
Sloan documentation Rich I have Sloan documentation on my 70 GS455 4 speed car. I will try to find it and post it later.
Kerry and Bob My Buick Assembly Manual lists a 3:42 axle standard on all non stage 70-72 GS 455 3 and 4 speed cars and limited slip as optional or was it standard? For the last 20 years, I always believed when one ordered a 70-72 GS 455 non stage car you automatically recieved a 3:42 posi rear axle. Do your Sloan docs show G1 or G4 for Positive traction differential? Also,I also always believed Buick only used close ratio M21 Muncie 4 speed trans but I am now feeling M20 wide ratio boxes were used on all 455 and stage 1 GS cars? I am alo interested if your cars are plain bench seat or high option cars thanks
No Posi Here Rich My car came with the (A3)M20 4 speed/3.42 open rear end OH code/(DC)AM radio and rear speaker/(C6)power steering/(U5)Instrument group/(OA)Door edge guards/ remote mirror/(V7) 14 in rally wheels/(L2)tinted windshield and (X2)Rallye steering wheel. Color was Desert gold/black vinyl top/(188) black bucket seat interior. Hope that helps
My 70 Stage 1 has a factory M-21. it also has "performance axle with positive traction" ie- 3.64 gears. Its a non A/C car. I believe anything over 3.42 got the close ratio trans Be careful with the RPO codes. I think all 4 speeds even M21s carried the M20 RPO code. I questioned this when I obtained my reproduction window sticker from Mike Trom
My 70 4 speed 455 is a notchback bench, 342, M20, A/C, PDisc, Manual Steering, 14" rallies. Burnished Saddle in/out with Dk. Brown vinyl top.
Thanks evryone ,keep your Sloan detail coming. So Non AC 70 GS stage 1 cars were the only cars factory equpped with M21 Close ratio trans? All non stage 455 and AC stage 1 4 speed cars received M20 wide ratio Muncie? This makes sense ,because in Pontiac GTO Land all GTO's and Firebirds ordered with standard 3:55 or Higher rear axle gears received M20 wide ratio muncies but if one order 3:90 or 4:33 gears Pontiac automatically gave you a M21 Close ratio muncie if you ordered a 4 speed.
Rich, Sounds like a cool optioned 70. Was this car on ebay awhile back? I remember seeing a Silver/blue 70 and thinking how rare it must be. The gear ratio was typically the driver, so unless a non-stage had an optional performance ratio gear, it would have been an M20. Congrats and good luck with it. Post some pics when you get a chance. Regards, Eric
Mine was a 3 speed, standard black interior with Fire red exterior. 3.42 non posi no AC, no power brakes. It does have power steering. Documented by Sloan. :beer
Eric This car I just bought was sold new in Alburqueque New Mexico and was found in the Apache desert east of Phoenix Arizona. Does your car have an open 3:42 axle? Oddly my car does not have Rally suspension ( rear sway bar with boxed lower contol arms ) does anyone who have posted have H6 ( rally suspension)on their Sloan docs ?
My '70 GS 455 Convertible was documented by the Sloan Museum. It originally had a 3 speed manual, AM/FM, Rear Speaker, 8-Track, G78-14 Whitewalls and Chrome Wheels, G80 Posi, Softray Tinted Windshield, Notchback Bench Seat, Convenience Group, Instrument Group and Rim Blow Steering Wheel. Diplomat Blue with Pearl White interior and White Top. It had NO Power Steering or Brakes and NO a/c. Mine did not have the Rally Suspension either. Ken
Hey Rich. My convertible was a Diplomat Blue, with a black bucket seat interior. Car was a 4 speed with consolette, power steering, sonomatic radio with rear speaker, positive traction differential(how it reads on the order sheet i have, does not give the axle ratio, but I think i remember counting it out to a 3:42), chrome plated wheels. Thats about it. Not too many options on the car. I wish I never sold it, but the car had a million miles on it and was actually bowed because the frame was so rotted. Ran great though!!! It appears to have been manufactured 11-17-69. One thing that was weird that I do remember about the car was that the engine had been mis-stamped. It had the SR and then an F.. like the guy doing the stamping was cocked the night before and tried to stamp over the R, but all 3 letters were clear as day and in the same font, so I'm positive it was the original motor to the car. The Vin # was stamped in the block to confirm that. Pretty amazing the stuff you find when you look hard enough. Bob
I was reviewing an original 70 GSX sales brochure last night the one that incorrectly lists valve diameter for Stage 1 engine as the same diameter as non stage standard 455. If you look at the description for the standard transmission for a 70 GSX it does not say M20 or M21 but does list gear ratio's for each gear and first gear is listed as 2:20 which is for a M21 close ratio muncie . Therefore ,that means means even a non stage 4 speed GSX/GS with 3:42 standard gear recieved M21 close ratio trans? Maybe this is another typo goof by Buick Marketing! I have not picked up my car yet to check but for those of you that have #'s matching Muncie's in your 4 speed GS cars please look on case to see stamps P0C19 A or B this decodes as P for Muncie,0 for 1970,C19 March 19 and finally A for wide ratio M20 or B for close ratio Muncie.This should be stamped on passenger side of main case vertically where tailstock housing attaches to main case. Please check you 4 speed tran's to clarify which trans is correct? thanks Rich
Rich, the 70 Buick Service manual shows the GS 455 with a close-ratio trans. Check out the triple black 4 speed car on ebay right now, what does that car remind you of??
Hi Rich - My understanding is that posi option was part of the GSX package, along with the stage1 package. I also believe the GS455 4-speed non-stage1 cars came standard with a 3.42 open rear. All the Buick muncie 4-speeds I've decoded were M21s. Just some things I've observed over the years :beer Does this answer your question?
