Re: keep the 904 or go with 46RH ?
[Re: DaytonaTurbo]
#250389
03/11/09 02:03 PM
03/11/09 02:03 PM
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Joined: Jan 2003
Posts: 9,826 las vegas
70AARcuda
master
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master
Joined: Jan 2003
Posts: 9,826
las vegas
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the OD units on a 42rh and 46rh are the same size...they only difference is the number of clutches and steels inside..
so on that end of the trans is not going to make any difference in trans tunnel surgery...
46rh is based on the 727 42rh is based on the 904
Tony
70 AARCuda Vitamin C 71 Dart Swinger 360 10.318 @ 128.22(10-04-14 Bakersfield) 71 Demon 360 10.666 @122.41 (01-29-17 @ Las Vegas) 71 Duster 408 (10.29 @ 127.86 3/16/19 Las Vegas)
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Re: keep the 904 or go with 46RH ?
[Re: Wedgeman]
#250390
03/11/09 04:17 PM
03/11/09 04:17 PM
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Joined: Sep 2003
Posts: 1,168 Vancouver, WA
MoparMarq
super stock
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super stock
Joined: Sep 2003
Posts: 1,168
Vancouver, WA
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Don't know about 904s (and very little about the later ones), but the trans designations say something about trans. 42RH decodes as 4 forward speeds, level 2 torque capacity, (something), hydromechanical actuacted. 46RH is 4 forward speeds, level 6 torque capacity. I'd go with the 46RH, if it becomes a choice of 42RH or 46RH.
As for the choice between 46RH and 904, I'd go 46RH as that gets you a tidier way of getting the overdrive.
Plus, though I may be out of left field here, some of the 42s have torque converter issues. My sister has a Jeep Grand Cherokee with the 42RE that will occasionally not stay in torque converter lockup driving on the highway (above 48 mph). I believe this is a known problem among dealers (yes, she had the TSB flash to the control unit). They refuse to look at the trans "because it hasn't thrown a code". (Whatever happened to good old-fashioned diagnosis?) My Durango had the same problem for a while (46RE trans) until I changed the fluid to Amsoil and put in a new filter. Problem solved in the Durango. Fluid and filter change in the GC helped a little, but didn't solve the problem. Maybe electrical, maybe the TC, maybe something weird about the Grand Cherokee version of the trans, I don't know.
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Re: keep the 904 or go with 46RH ?
[Re: MoparMarq]
#250394
03/12/09 07:36 AM
03/12/09 07:36 AM
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Joined: Jun 2008
Posts: 251 Lithonia, Ga
36PLYM
enthusiast
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enthusiast
Joined: Jun 2008
Posts: 251
Lithonia, Ga
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Quote:
Don't know about 904s (and very little about the later ones), but the trans designations say something about trans. 42RH decodes as 4 forward speeds, level 2 torque capacity, (something), hydromechanical actuacted. 46RH is 4 forward speeds, level 6 torque capacity. I'd go with the 46RH, if it becomes a choice of 42RH or 46RH.
As for the choice between 46RH and 904, I'd go 46RH as that gets you a tidier way of getting the overdrive.
Plus, though I may be out of left field here, some of the 42s have torque converter issues. My sister has a Jeep Grand Cherokee with the 42RE that will occasionally not stay in torque converter lockup driving on the highway (above 48 mph). I believe this is a known problem among dealers (yes, she had the TSB flash to the control unit). They refuse to look at the trans "because it hasn't thrown a code". (Whatever happened to good old-fashioned diagnosis?) My Durango had the same problem for a while (46RE trans) until I changed the fluid to Amsoil and put in a new filter. Problem solved in the Durango. Fluid and filter change in the GC helped a little, but didn't solve the problem. Maybe electrical, maybe the TC, maybe something weird about the Grand Cherokee version of the trans, I don't know.
The something designation you are looking for is R for rear wheel drive
36 Plymouth Coupe 318 w/360 heads 518 trans 8 3/4 rear Ga. Tech BCE'78
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