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19:05:10 - 04/26/2024
Dakota Performance
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T-Beck
Dodge Dakota
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5/12/2004
13:18:57
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 Subject: Will Any 3.9 Trans match any year 3.9
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Message:
Will a a '94 tranny from a 3.9 bolt onto any other 3.9, no matter what year it is?
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IntenseDak39
*GenIII*
5/12/2004
13:52:08
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
they will all bolt up but not all share the same speedo.
6.6 Lt. Big Block, 727 TF shift kit, 452 heads, edelbrock 750 cfm, .513/.513 284/300 crower cam, comp cams springs, comp cams pushrods, 1.5 roller rockers, dp intake, mopar ignition, mopar windage tray, dual exhaust w/ 40 series flowmasters, 4.10 gears, coilover drag suspension, approx, 3500 lbs
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T-BECK
Dodge Dakota
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5/12/2004
16:00:21
|  RE: Will Any 3.9 Trans match any year 3.9
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Message:
why's that. what about a 5.2, will that match up.
if i took my 727 tranny out of my 85 ram so that
i could put a 5.9 in there, how much work
would that be. what would you reccomend?
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IntenseDak39
*GenIII*
5/12/2004
17:06:37
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
i dont know why they dont all have the same speedometer drive. That was just something chrysler did.
early years were cable drive, then they had a electronic sensor with a gear in the tailshaft. 98 and newer have a ring that attaches to the carrier in the rear end.
All the 5.2's, 5.9, and 3.9's share the same transmission bellhousing bolt pattern. The 727 would bolt up. The only thing to look at is the torque converter. The 5.2 and 3.9 are internally balanced so you would need a torque converter that isnt balanced while the 5.9 is externally and would required the appropriate weights.
6.6 Lt. Big Block, 727 TF shift kit, 452 heads, edelbrock 750 cfm, .513/.513 284/300 crower cam, comp cams springs, comp cams pushrods, 1.5 roller rockers, dp intake, mopar ignition, mopar windage tray, dual exhaust w/ 40 series flowmasters, 4.10 gears, coilover drag suspension, approx, 3500 lbs
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gen1dak
Dodge Dakota
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5/12/2004
21:11:57
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
The first overdrives had the gear driven speedo with cable drive, as well as an electronic sensor for the computer. The Magnum-equipped trucks went to the electric speedo, but still had the gear drive for the sensor. In 1996, the gear drive speed sensor went away in all models (it was already being phased out in some models), as did the hole in the case to mount the sensor. The 727 will bolt up, but typically, is about 4 inches shorter than the overdrive units. Definitely stick with the pre-'96 trannies. 1996 and up require computer controls for all functions.
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IntenseDak39
*GenIII*
5/12/2004
22:23:05
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
i dont know how the small block 727 compares to the big block 727 but the big block 727 is less than 2" shorter than the 42re.
6.6 Lt. Big Block, 727 TF shift kit, 452 heads, edelbrock 750 cfm, .513/.513 284/300 crower cam, comp cams springs, comp cams pushrods, 1.5 roller rockers, dp intake, mopar ignition, mopar windage tray, dual exhaust w/ 40 series flowmasters, 4.10 gears, coilover drag suspension, approx, 3500 lbs
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uh
Dodge Dakota
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5/14/2004
20:07:15
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
lot stronger clutch packs in the BB version. and stall speed of converter, otherwise all the same.
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Regular Joe
Dodge Dakota
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5/15/2004
16:45:38
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
How do you know so much IntenseDak39???
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gen1dak
Dodge Dakota
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5/15/2004
17:49:09
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
The aforementioned HD clutches, etc, can also be put in the smallblock 727.
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Kowalski
Dodge Dakota
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5/16/2004
06:28:06
|  RE: Will Any 3.9 Trans match any year 3.9
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Message:
Its the 904 tranny that's significantly shorter. Another difference between small and big block 747s would be the bellhouse. Intense Dak knows so much because of experience...
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IntenseDak39
*GenIII*
5/17/2004
10:05:40
| RE: Will Any 3.9 Trans match any year 3.9
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Message:
i dont know about the factory stall for the 727's but putting a small block converter on the big block 727 would raise your stall speed.
i know the 727 is 2" shorter because i measured them. And because the back of the big block sits 2" further back than the back of the 3.9, my stock driveshaft fit and all i had to do was buy a new yoke and u-joint.
friggin u-joint was more friggin expensive than the slip yoke... and i already broke it. frock!
"Intense Dak knows so much because of experience"
bingo!
thanx!
you got your guys on here that just ask questions. Than you got guys on here that question everybody else. Than there are a few of us on here that just do it! You'll learn a lot more with a set of wrenches.
6.6 Lt. Big Block, 727 TF shift kit, 452 heads, edelbrock 750 cfm, .513/.513 284/300 crower cam, comp cams springs, comp cams pushrods, 1.5 roller rockers, dp intake, mopar ignition, mopar windage tray, dual exhaust w/ 40 series flowmasters, 4.10 gears, coilover drag suspension, approx, 3500 lbs
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