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Transmission Identification

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Old Jun 11, 2017 | 09:33 PM
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Default Transmission Identification

I need help identifying the transmission in my '93 Dakota, can any one tell me where to look?

Thanks
 
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Old Jun 11, 2017 | 10:06 PM
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On the transmission.

Right now, you can also order the build sheet from FCA; they roll off after 25 years, so do it now.

RwP
 
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Old Jun 26, 2017 | 08:20 PM
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You either have a 42rh for v6, 44rh for v8, or ax15's if it's a standard.
 
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Old Jun 29, 2017 | 07:00 PM
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Originally Posted by Toby Warford
You either have a 42rh for v6, 44rh for v8, or ax15's if it's a standard.
not so fast. I have had a 92, a 93 and a 96 with V8s... all have had the 46rh (96 was 46rE) and I swapped a 46RH into a 94 I had w/a V6. Direct swap, no driveshaft mods needed even.
 
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Old Jun 29, 2017 | 09:35 PM
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Originally Posted by volaredon
not so fast. I have had a 92, a 93 and a 96 with V8s... all have had the 46rh (96 was 46rE) and I swapped a 46RH into a 94 I had w/a V6. Direct swap, no driveshaft mods needed even.
What was the difference in how the 3.9 performed Volare?
 
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Old Jun 30, 2017 | 06:57 AM
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what do you mean? The gear ratios between the "lighter" (42,44 rh/re) and the "heavier" transmission (46 rh/re) are the same. It ran like a 3.9. I did not do any mods on the engine related to the trans swap.....
 
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Old Jun 30, 2017 | 08:55 AM
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Originally Posted by volaredon
what do you mean? The gear ratios between the "lighter" (42,44 rh/re) and the "heavier" transmission (46 rh/re) are the same. It ran like a 3.9. I did not do any mods on the engine related to the trans swap.....
I should have been more clear. Assuming the replaced trans ran properly at some point, Was it an improvement?
Did you pull with both trans? If so was there a noticeable difference in the heavier duty trans performance on pulling?
 
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Old Jun 30, 2017 | 10:22 PM
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Originally Posted by volaredon
what do you mean? The gear ratios between the "lighter" (42,44 rh/re) and the "heavier" transmission (46 rh/re) are the same. It ran like a 3.9. I did not do any mods on the engine related to the trans swap.....
No they're not. They're are slightly different. Although, just about close enough to be the same. I looked that up last night. The only gear ratio that's the same is final OD. Maybe third but I don't think so. It's something like 2.94 and 2.74 for first between the 42 and 46.
 
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Old Jun 30, 2017 | 10:22 PM
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yes the replaced trans operated properly when I got the truck. and no there was no noticeable performance difference. In order for that to happen I would have had to have put in a different "stall speed" or somehow change the gearing within the innards of the transmission. which is dang near impossible because they are all geared the same in a given gear....
in and of itself, in daily driving you won't notice a difference in performance. But you WILL notice a difference in durability and longevity with the heavier duty transmission. and the cost of one vs the other in the junkyard or to rebuild one vs the other is negligible. so if I can improve durability especially for similar cost, I am all in because I do not like redo's.

Power wise whether just cruising or towing, I noticed NO difference at all. but the piece of mind knowing it would last longer due to being more heavy duty? Priceless..... All else being the same the heavier trans will last longer with the same amount of HP driving it. but in either case an auxilary trans cooler plumbed in line with the factory one in the radiator is the best single improvement you can make there. if you were to make 2 improvements the 2nd one (and a close 2nd at that) would be a shift kit. which does not necessarily mean neck snapping, parts breaking shifts. Not at all. I put them into my last 3 builds (I use a Transgo TF-ODJr) and the difference in "feel" to a stock OEM shift is not that drastic but it does definitely help your trans IF it is in good shape to begin with.

I do all my own work including trans overhauls and rear end overhauls, so not having to drop it off and pay someone else if youre able to is also priceless.....
 
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Old Jun 30, 2017 | 10:30 PM
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Originally Posted by Toby Warford
No they're not. They're are slightly different. Although, just about close enough to be the same. I looked that up last night. The only gear ratio that's the same is final OD. Maybe third but I don't think so. It's something like 2.94 and 2.74 for first between the 42 and 46.
You might actually be right on that 1st gear, I know that 2nd gear is 1.45 on both and 1:1 in 3rd and the OD ratio is also the same since the OD section is interchangeable between all of them.
I thought I remember seeing that they had made the 1st (low gear) ratio the same between them when they came out with the OD trannys.

I know that with the old 3 speeds the 727 and 904s were the same ratios throughout, until they came out with the "998" and "999" which for all intents and purposes are based off the 904, 904, 998 and 999 are still all versions of the "lighter duty transmission" with the 727 being the heavier duty. The 998/999 had the 2.7something 1st gear while the "regular" 904 and 727 were 2.45 low gear.
gives you an idea how long I have been messing with Dodge products.
one of my current ones is a '78 Sport Fury and another I own is an 80 Volare. been driving for 32 years and have never owned anything but a Dodge or Plymouth although I often get stuck working on other brands.... I must say though that I draw the line at Ford and Chevy as far as what I will work on, Honda Toyota Hyundai etc I won't even let park in my driveway.... (I know, getting off topic here)
 
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