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transmission

Forum: C3 Engines, Driveline and Handling

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transmission

Posted: 9/21/09 1:08pmMessage 1 of 19
t
tonyb47
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Suffern, NY - USA
Joined: 3/16/2005
Posts: 227
Vette(s): 1976 restored,new interior,custom paint(purple),body kit,rebuilt engine,trans,upgraded sound system

can anyone tell me if the 76 automatics came with a THM350 or 400 The restoration book I have for corvettes say a thm 350 and the way to tell them apart is the shape of the pan, the 350 uses a rectangle pan with one corner angled while the 400 is a irregular shape, does that sound correct

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transmission

Posted: 9/21/09 1:38pmMessage 2 of 19
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lukesvette
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HOWELL, NJ - USA
Joined: 5/18/2004
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Vette(s): 1979, Targa Blue (72 Color), Pace Car rear spoiler, L88 hood, Dark blue factory interior, 525HP 406, HD 700R4, 370 gears,Steeroids, composite rear spring, TT IIs wrapped in T/A Radials.
Correct Tony. Here's a good link to assist you:
 
 
LukesVette2009-09-21 13:39:37

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transmission

Posted: 9/21/09 6:42pmMessage 3 of 19
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cthulhu
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Hot Springs, AR - USA
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Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans

transmission

Posted: 9/21/09 7:42pmMessage 4 of 19
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Adams' Apple
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Duncanville, TX - USA
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Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas
For '76, the L82 engines used the 400, and the L48 used the 350...

Joel Adams
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transmission

Posted: 9/22/09 6:28amMessage 5 of 19
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tonyb47
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Suffern, NY - USA
Joined: 3/16/2005
Posts: 227
Vette(s): 1976 restored,new interior,custom paint(purple),body kit,rebuilt engine,trans,upgraded sound system
thanks guys for links,I'm pretty sure my transmission is shot,won't shift into third and when I checked the fluid it was black, any suggestions where to get another transmission, I was looking in the summit catalog and they have tci's not bad price are they any good. Would I better off getting a new one or having mine rebuilt. I also checked jasper engines and a rebuilt 400 is $1390. and a 350 is $1276. and includes shipping and returning the core
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transmission

Posted: 9/22/09 10:22pmMessage 6 of 19
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cthulhu
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Hot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans

I would suggest you take this as an opporunity to put in an OD auto trans

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transmission

Posted: 9/24/09 10:00amMessage 7 of 19
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aceinthehole
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Manteca, CA - USA
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Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed
[QUOTE=cthulhu]I would suggest you take this as an opporunity to put in an OD auto trans[/QUOTE]
 
Seriously. A 700R4 will not only come off the line quicker ( due to the gear ratio difference) but once it kicks into overdrive the Rpms drop way off and makes for great freeway driving. A very worthwhile upgrade unless you mean to keep it numbers matching. Of course the conversion would cost a little more than a stock replacement.

Jimmy B.
Just can't wait to get on the road again.

 
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transmission

Posted: 9/24/09 4:01pmMessage 8 of 19
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cthulhu
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Hot Springs, AR - USA
Joined: 4/24/2004
Posts: 3236
Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans
since you have a 350 now a well built 200r4 would be very easy and affordable
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transmission

Posted: 9/25/09 6:13amMessage 9 of 19
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tonyb47
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Suffern, NY - USA
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Posts: 227
Vette(s): 1976 restored,new interior,custom paint(purple),body kit,rebuilt engine,trans,upgraded sound system
What are the differences and advantages for a 200r4
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transmission

Posted: 9/25/09 8:37amMessage 10 of 19
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Redwingvette
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Waterford, MI - USA
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Vette(s): 1973 Red coupe
Besides the OD it uses a lock-up convertor. When it is locked your trans runs cooler.
They also have different 1st and 2nd ratios that improve take-off's.

200-4R: 2.74 first, 1.57 second, 1.00 third, .67 fourth

Turbo 400: 2.48 first, 1.48 second, 1.00 third.

Turbo 350: 2.52 first, 1.52 second, 1.00 third

The advantage to using the 200-4r as a replacement is the size. It will fit in your car without having to change the crosmember or driveshaft length. You wil need to bend the trans cooling lines a little to get them to line up with the trans and you will need to hook up a TV cable. The shifter detent will need to be altered or replaced to match the trans shift locations. I bought my setup from http://Bowtieoverdrives.com but there are others that do the same thing.

Redwingvette2009-09-25 08:38:28

Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Dewitt radiator and dual electric fans
Borgeson Steering box
 


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