Time to start thinking about an Auto. TH400 builders - Page 2 - Camaro5 Chevy Camaro Forum / Camaro ZL1, SS and V6 Forums

olblue75 · 02-26-2021, 05:45 AM

From what I remember the 400’s can in a short and long variations an where mostly big car, station wagons, and trucks.
My Grandfather had a 70’s station wagon with a 400 cid small block and a 400 trans setup from the factory. My dad installed it in a 69 Chevy truck that a 4.11 straight six an man you couldn’t keep the tires from spinning.

gunchamp · 03-02-2021, 01:39 PM

Quote:

Originally Posted by BuddyLee

Bo, is the OD not counted as a speed? One, two, three, and OD.

You can add overdrive to a th400, but they do not come with it. They are 3 speeds as was stated

Bo White · 03-02-2021, 08:36 PM

Overdrives are overrated....
Guys that have already posted about the th400 not having an OD gear are correct. Th350 and th400 are 3 forward speed transmissions.
Th350 is 2.52/1.52/1.00 ratios
Th400 is 2.48/1.48/1.00 ratios

eLeSthree · 03-31-2021, 07:37 AM

Surprised to hear that about RPM. Always thought they were one of the best. Their quote was pretty high, but it has 300mm input and mainshafts. Other less expensive quotes show stock shafts.

Going to stick with the 1000 HP rated field.

I dont know squat about transmission building, and dont want to be yanking the trans in and out all the time. Which upgrades should I be looking for while getting quotes?

CamaroCracka · 03-31-2021, 08:51 AM

The site says level V is OEM blocking rings and no bronze fork pads. Level VI gets you the 9310 main shaft. GForce makes those shafts, but they have an exclusive agreement with RPM. None of their builds include new gears.

J.W Performance Transmissions is right here in Brevard, but there must be a number of good shops around Bradenton.

eLeSthree · 03-31-2021, 11:17 AM

Quote:

Originally Posted by CamaroCracka

The site says level V is OEM blocking rings and no bronze fork pads. Level VI gets you the 9310 main shaft. GForce makes those shafts, but they have an exclusive agreement with RPM. None of their builds include new gears.

J.W Performance Transmissions is right here in Brevard, but there must be a number of good shops around Bradenton.

Thanks for the recommendation, I sent them an email.

IKILLEDSUPERMAN_ZL1 · 03-31-2021, 02:23 PM

I've had a few TH400s back in the day. I think a good set of clutches and input shaft with a decent valve body goes along ways on those things. They are pretty stout!

ttshovel · 04-17-2021, 02:42 PM

I had turner racing transmissions out of Dayton Ohio build mine. It's nothing special. Stock shafts, bte promod drum, extreme automatics vb, and billet adj rear servo. Right at $2k for the rebuild with my core.

Tajefe Couple · 04-17-2021, 09:19 PM

Anybody run a Gear Vendors OD on a TH400 yet?

02-26-2021, 05:45 AM	#15
olblue75 Drives: 2010 2SS/RS Join Date: Dec 2009 Location: Clarksville Tennesse. Posts: 6,062	From what I remember the 400’s can in a short and long variations an where mostly big car, station wagons, and trucks. My Grandfather had a 70’s station wagon with a 400 cid small block and a 400 trans setup from the factory. My dad installed it in a 69 Chevy truck that a 4.11 straight six an man you couldn’t keep the tires from spinning. __________________ Orange Krush II 1LE Front sway bar, Splitter, shocks and struts, Z28 dual mode mufflers, Intake, UCA Bushings, and Toresen 3.91 Diff. 1 piece DSS Drive Shaft, ZL1/C7 Calipers, and 32mm JPSS Rear Bar. ASC race spec splitter and wicker. 6th Gen M017 Wheels. Stainless Works 1 7/8 LTs. DSE and PAFDT Suspension components.

03-02-2021, 08:36 PM	#17
Bo White Drives: 2015 Summit White 2SS 1LE Join Date: Feb 2012 Location: Vance Alabama Posts: 8,017	Overdrives are overrated.... Guys that have already posted about the th400 not having an OD gear are correct. Th350 and th400 are 3 forward speed transmissions. Th350 is 2.52/1.52/1.00 ratios Th400 is 2.48/1.48/1.00 ratios __________________ Retired wanna be cylinder head porter 2015 2SS 1LE Clutch reservoir, Vararam DRX, ported TB, TSP 2" headers, MGW shifter Totalled: 2010 1SS Wilkes Performance/Eagle 416 shortblock, TSP custom valvetrain, PRC 260 heads, Edelbrock Pro Flo 102, th400 swap, 8" PTC 5500 stall= 535/435 at the wheels tuned Gen 3 Performance and Dyno 10.97 @ 124 full weight in 3100 DA CamaroFest X

03-31-2021, 07:37 AM	#18
eLeSthree Drives: 2011 Camaro SS 6sp Join Date: Nov 2016 Location: Drivers Seat Posts: 1,904	Surprised to hear that about RPM. Always thought they were one of the best. Their quote was pretty high, but it has 300mm input and mainshafts. Other less expensive quotes show stock shafts. Going to stick with the 1000 HP rated field. I dont know squat about transmission building, and dont want to be yanking the trans in and out all the time. Which upgrades should I be looking for while getting quotes? __________________ 2011 Camaro SS---SOLD TMS Dart 427 FED M311s, ESS Tuning G4 Blower, DSX Triple FP Assembly, DSX FF, FIC1300, Mcleod RXT 1200HD, Edlebrock Pro Flo XT 1158whp 1017wtq. 2010 CTS-V A6 - "Stock" SOLD 630whp 658wtq 2024 F-150 RCSB 5.0 4x4 waiting for tunes...

03-31-2021, 08:51 AM	#19
CamaroCracka Drives: 2010 Turbo LS3 Join Date: Dec 2009 Location: Palm Bay, FL Posts: 2,729	The site says level V is OEM blocking rings and no bronze fork pads. Level VI gets you the 9310 main shaft. GForce makes those shafts, but they have an exclusive agreement with RPM. None of their builds include new gears. J.W Performance Transmissions is right here in Brevard, but there must be a number of good shops around Bradenton. __________________ 2010 SS - On3 kit with downpipe cutout, CTR 78/80, CompCam 239/251 620/632 122+4, E85, Z28 suspension and ZL1 diff with Outlaw axles. Gen6 ZL1/1LE brakes. 2011 Vert - 416/w 230/236 .612/.602 115lsa, 1LE suspension w/32mm rear bar. Z28 diff. ZL1 brakes.

03-31-2021, 02:23 PM	#21
IKILLEDSUPERMAN_ZL1 Drives: 2011 Camaro SS Join Date: Jul 2017 Location: Wichita,KS Posts: 603	I've had a few TH400s back in the day. I think a good set of clutches and input shaft with a decent valve body goes along ways on those things. They are pretty stout! __________________ 2011 Camaro 2SS, 6.0 iron block forged bottom end, Dart heads, BTR intake, Huron twin turbo kit, Summit stage 3 twin turbo cam, Circle D stage 4 6L90, 3800 FTI converter. BMR suspension, Viking coil overs, Fore triple pump fuel system.

04-17-2021, 02:42 PM	#22
ttshovel Drives: 12 camaro ss, 72 chevelle, 91camaro Join Date: Dec 2013 Location: findlay,oh Posts: 2,069	I had turner racing transmissions out of Dayton Ohio build mine. It's nothing special. Stock shafts, bte promod drum, extreme automatics vb, and billet adj rear servo. Right at $2k for the rebuild with my core. __________________ 12 camaro ss 427lsx, th400, f310 heads, crower shaft mounts, gpi specd solid roller, shearerfab 2k hp a/w, twin bullseye 88mm turbos, hughes pro ssx bolt together converter, holley dominator, 8.50 cert, backhalf, Ford 9", 33x17x16 tires, c16 fuel

04-17-2021, 09:19 PM	#23
Tajefe Couple Drives: Never just fly under the radar Join Date: Jul 2015 Location: Kansas Posts: 1,531 View My Garage	Anybody run a Gear Vendors OD on a TH400 yet? __________________ 1-8-4-3-6-5-7-2 Old Skool