Editing General Motors transmissions (section)
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==Six speed manual== GM used three basic 6 speed manuals over the years: *ZF S6-40 *Borg Warner/Tremec T56 *New Process/New Venture NV5600 in trucks ===German ZF S6-40=== Starting with the 1988-'96 Corvette, a German ZF 6-speed was used, designated S6-40. It was stout and reliable, but its limited use and short production run didn't give rise to wide aftermarket support. In fact GM didn't even stock service parts for the transmissions, instead opting to provide remanufactured units instead of repairing them. Although it ended up costing GM less in the long run, it was a concept not warmly received by the public. Early models were rated for 400 ft/lbs, and later models were rated to 450 ft/lbs. ZF 6-speed ratios are as follows: *Reverse - 2.50 *First - 2.68 *Second - 1.80 *Third - 1.29 *Fourth - 1.00 *Fifth - 0.75 *Sixth - 0.50 [[File:CutawayZF S6 40.jpg|thumb|left|300px|ZF S6-40 transmission]] <br style="clear:both"/> ===Borg Warner/Tremec T56=== Starting with the 1992-1993 GM F-body (Camaro, Firebird, Trans Am), the six speed was a Borg Warner-designed, Tremec-built T56 transmission. Although the basic design, case, and internal operation were the same, three different ratio gear sets were available in GM applications. In 1993, F-body cars were equipped with two optional rear axle ratios: 2.73 and 3.23. Beginning in 1994, all T56 cars used the same ratio gear set regardless of rear axle ratio. 1992-1993 T56 with the lower gear sets had a slightly lower torque capacity in the 350 lb-ft range while 1994-later (high) gear sets reduced the side loads on the case and were rated to 450 lb-ft. T56 use continued like this until 1997 when it also started being used in the Y-body (Corvette) as a rear-mounted transaxle, and continued on in F-bodies behind the LS1 until the end of their production. Of note is the fact that all T56 transmissions share an interchangeable main case; even those found in Holdens, Fords, Vipers, and Aston Martins. What differs is the front adapter plate, tail shaft housing, shifter, and input/output shafts. Internally, there were some interchangeable differences, like the type of shift forks and synchronizers used, but for the most part all T56 transmissions are built on the same stout center section. ====T56 general info==== {| class=wikitable !Tag ID !Application !Torque Rating !1st !2nd !3rd !4th !5th !6th !Rev !Input Splines !Output Splines |- |1386-000-003||1992 Dodge Viper||330||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||30 |- |1386-000-005||1993-1995 Dodge Viper||550||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||30 |- |1386-000-006||1993 Camaro/Firebird w/2.73 final drive "M28"||350||3.36:1||2.07:1||1.35:1||1.00:1||0.80:1||0.62:1||3.28:1||26||27 |- |1386-000-007||1993 Camaro/Firebird w/3.23 final drive "M29"||400||2.97:1||2.07:1||1.43:1||1.00:1||0.80:1||0.62:1||3.28:1||26||27 |- |1386-000-009||1994-1995 Camaro/Firebird||450||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |1386-000-011||GM Aftermarket||450||2.97:1||2.07:1||1.43:1||1.00:1||0.80:1||0.62:1||3.28:1||26||27 |- |1386-000-012||Mustang 5.0 Aftermarket||450||2.97:1||2.07:1||1.43:1||1.00:1||0.80:1||0.62:1||3.28:1||10||31 |- |1386-000-013||Holden||450||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |1386-000-014||1996-2002 Dodge Viper||||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||30 |- |1386-000-016||1996-1997 Camaro/Firebird||450||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |1386-000-017||1998 Camaro/Firebird||450||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |1386-000-018||1996-2002 Dodge Viper||450||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||30 |- |1386-000-019||||390||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1|||| |- |1386-000-020||1999-2002 Camaro/Firebird||450|||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |1386-000-021||Aston Martin||450||2.66:1||1.78:1||1.30:1||1.00:1||0.79:1||0.63:1||2.90:1||26||30 |- |1386-000-022||Holden Commodore||350||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |1386-000-023||Corvette C5||375||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |1386-000-024||||375||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1|||| |- |1386-000-025||Corvette Z06 C5||385||2.97:1||2.07:1||1.43:1||1.00:1||0.84:1||0.56:1||2.90:1||26||27 |- |TNET-1077||||415||2.97:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1|||| |- |TNET-1247||Dodge Viper||450||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||30 |- |TUET-1259||4.6 Mustang Aftermarket w/mech speedo||450||2.97:1||2.07:1||1.43:1||1.00:1||0.80:1||0.62:1||3.28:1||10||31 |- |TUET-1260||4.6 Mustang Aftermarket w/elec speedo||450||2.97:1||2.07:1||1.43:1||1.00:1||0.80:1||0.62:1||3.28:1||10||31 |- |TUET-1452||Chevrolet Corvette||370||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |TUET-1453||Chevrolet Corvette||370||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||27 |- |TUET-1576||Aston Martin||415||2.66:1||1.78:1||1.30:1||1.00:1||0.79:1||0.63:1||2.90:1||26||30 |- |TUET-1660||||350||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||||27 |- |TUET-1694||2003-2004 Mustang Cobra||450||2.66:1||1.78:1||1.30:1||1.00:1||0.79:1||0.63:1||2.90:1||26||31 |- |TUET-1806||Dodge Viper SRT-10||550||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||30 |- |TUET-2022||Cadillac CTS-V||||2.97:1||2.07:1||1.43:1||1.00:1||0.84:1||0.56:1||2.90:1|||| |- |TUET-2060||Mustang Cobra||450||2.97:1||2.07:1||1.43:1||1.00:1||0.80:1||0.62:1||3.28:1||10||31 |- |TUET-2062||Dodge Viper||550||2.66:1||1.78:1||1.30:1||1.00:1||0.74:1||0.50:1||2.90:1||26||30 |- |TUET-2066||Pontiac GTO/Holden Monaro||||2.97:1||2.07:1||1.43:1||1.00:1||0.84:1||0.56:1||2.90:1||26||27 |- |TUET-5044||Cadillac CTS-V||||2.97:1||2.07:1||1.43:1||1.00:1||0.84:1||0.56:1||2.90:1|||| |- |TUET-6450||T-56 Ford N/A XR6||||3.35:1||2.07:1||1.35:1||1.00:1||0.80:1||0.63:1||||23||31 |- |TUET-7477||T-56 Magnum Chevy Aftermarket||||2.66:1||1.78:1||1.30:1||1.00:1||0.80:1||0.63:1||||26||27 |- |TUET-7484||T-56 Magnum Ford Aftermarket||||2.66:1||1.78:1||1.30:1||1.00:1||0.80:1||0.63:1||||10||31 |- |TUET-8274||T-56 Magnum Ford Aftermarket||||2.97:1||2.10:1||1.46:1||1.00:1||0.74:1||0.50:1||||10||31 |- |TUET-8277||T-56 Magnum Chevy Aftermarket||||2.97:1||2.10:1||1.46:1||1.00:1||0.74:1||0.50:1||||26||27 |} ====T56 transmission ratios- 1993 F-body with 2.73:1 axle:==== *Reverse - 3.28 *First - 3.36 *Second - 2.07 *Third - 1.35 *Fourth - 1.00 *Fifth - 0.80 *Sixth - 0.62 ====T56 transmission ratios- 1993 F-body, 3.23:1 axle:==== *Reverse - 3.28 *First - 2.97 *Second - 2.07 *Third - 1.43 *Fourth - 1.00 *Fifth - 0.80 *Sixth - 0.62 ====T56 transmission ratios- 1994-current GM production:==== *Reverse - 2.90 *First - 2.66 *Second - 1.78 *Third - 1.30 *Fourth - 1.00 *Fifth - 0.74 *Sixth - 0.50 [[File:Tremec dimensions.jpg|thumb|400px|left|T56. Note the multiple options for shifter mounting positions.]] <br style="clear:both"/> ===T56 transmission torque specs=== *Backup lamp switch 20 ft/lb *Clutch actuator cylinder bolt 71 in/lb *Clutch housing bolt 37 ft/lb *Control lever handle bolt 18 ft/lb *Gear select/skip shift solenoid 30 ft/lb *Reverse lockout assembly bolt 13 ft/lb *Reverse lockout solenoid 30 ft/lb *Shift control bolt 13 ft/lb *Shift control closeout Boot Bolt 18 in/lb *Shift control knob 27 ft/lb *Transmission bolt 37 ft/lb *Transmission drain/fill plug 20 ft/lb *Transmission mount bolt 38 ft/lb *Transmission mount nut 77 ft/lb *Transmission support bolt 66 ft/lb *Vehicle speed sensor bolt 89 ft/lb ===NV5600=== [[File:Nv5600 dimens1.jpg]]<table style="float: right;" border="1" cellpadding="2" cellspacing="0"><tr> <td colspan="2" bgcolor="#FFf8dc" align = "center"><b>NV5600<br>Gear Ratio</b></td> </tr> <tr> <td><b> 1st</b></td> <td><b>5.63</b></td> </tr> <tr> <td><b> 2nd</b></td> <td><b>3.38</b></td> </tr> <tr> <td><b> 3rd</b></td> <td><b>2.04</b></td> </tr> <tr> <td><b> 4th</b></td> <td><b>1.39</b></td> </tr> <tr> <td><b> 5th</b></td> <td><b>1.00</b></td> </tr> <tr> <td><b> 6th</b></td> <td><b>0.73</b></td> </tr> <tr> <td> <center><b>R</b> </center> </td> <td><b>5.63</b></td> </tr> </table> [[File:NV5600.jpg|frame|left|NV5600]] Designed by New Venture, this stout truck six speed is up to the task of living behind engines like the Duramax and 8100 Vortec. It has a limited application for use in hot rods due to its huge size, excessive weight, and truck-like gear ratios. ;There are two versions of the NV5600<nowiki>:</nowiki> *The Ram version is rated for 550 lb-ft torque *A HD version for larger trucks is rated for 650 lb-ft torque <br style="clear:both"/>
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