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HG Trimatic Code? - Trimatic Transmission code advice
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htprem Offline
#1 Posted : Monday, 15 January 2018 10:20:34 AM(UTC)
htprem

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Hi All,

Does anybody know what a cable kickdown Trimatic with the code H V (definitely not H Y) would be out of?

I am guessing it is out of an HG or LC maybe?

Any advice would be appreciated.

htprem
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Dr Terry Offline
#2 Posted : Monday, 15 January 2018 10:26:21 AM(UTC)
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A Trimatic with an HV code is out of an HG 186-S with a T-bar console shift. It is unique in that it has the shifter on the LH side of the transmission.

Dr Terry
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htprem on 15/01/2018(UTC)
htprem Offline
#3 Posted : Monday, 15 January 2018 10:44:56 AM(UTC)
htprem

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Hi Dr Terry,

Thanks for your advice.

I can see how the left hand side floor shift aspect of the transmission is unique, but am intrigued that you mention 186S - did the S motors have a slightly different transmission (well, internals) to the standard 186?

Thanks

htprem
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Dr Terry Offline
#4 Posted : Monday, 15 January 2018 11:42:50 AM(UTC)
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Yes, they did. Each Trimatic is closely matched to each engine. For example in HQ the 173, 202, 253 & 308 transmissions were different to each other. The V8 ones obviously had a larger bell housing, but the valve bodies in each was tailored to match that particular engine's torque curve.

Dr Terry

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htprem Offline
#5 Posted : Monday, 15 January 2018 12:14:53 PM(UTC)
htprem

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Hi Dr Terry,

interesting that Holden went to that sort of effort, given they scrimped elswhere - I am presuming the Powerglides are all the same except for 6 vs V8?

Would you happen to know the code for an HG 186 Floorshift Trimatic?

Cheers

htprem
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Dr Terry Offline
#6 Posted : Monday, 15 January 2018 1:37:03 PM(UTC)
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An HG 186 floor shift Trimatic has the code HB. Don't get too concerned about the minor differences in calibration between the different Trimatics. Over the years a lot has changed, the clutch materials & fluids are much improved & the auto trade has vast experience in making these boxes work well.

AFAIK all HD-HT 6-cylinder Powerglides were the same except for the floor shift variety, which only differ in the shape of the selector lever. There are 2 distinct types of V8 Powerglides though. The ones which fits behind the 307-350 Small Block Chev V8s have a one-piece housing., whereas the HT 253/308 Powerglides are basically 6-cyl units with a unique bolt-on bell housing. Again each of those have either column shift or floor shift style levers on them.

Dr Terry

Edited by user Monday, 15 January 2018 1:40:26 PM(UTC)  | Reason: Not specified

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HK1837 Offline
#7 Posted : Monday, 15 January 2018 1:55:12 PM(UTC)
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Just to expand on Terry's info, the HT-HG 253/308 powerglides whilst being a 6cyl box with a unique bellhousing, also used the tail-housing from a 307/327/350 powerglide thus used a similar gearbox crossmember to the SBC box, and also used the LH side speedo cable and the SBC style crossover mechanism for the column shift examples. The 6cyl powerglides used a RH side speedo connection and shared the gearbox crossmember with a all syncro 3spd IRC
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htprem Offline
#8 Posted : Monday, 15 January 2018 3:05:31 PM(UTC)
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Thanks for the very informative replies to my post.

Cheers

htprem
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