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| Overdrive in a full size Ram https://slantsix.org/forum/viewtopic.php?t=39735 |
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| Author: | 65 dartman [ Tue Apr 06, 2010 3:16 pm ] |
| Post subject: | Overdrive in a full size Ram |
Does anyone have an idea of when the A500/A518 was first used in the full size Ram. Reason I ask is since I have an 87 D100, one ought to fit with virtually no modifications (other than finding one of those elusive adapters to mate the slant to the transmission). I figure a non-computer controlled transmission from about a 93 or 94 (or earlier) ought to work. |
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| Author: | SlantSixDan [ Tue Apr 06, 2010 4:15 pm ] |
| Post subject: | Re: Overdrive in a full size Ram |
Quote: Does anyone have an idea of when the A500/A518 was first used in the full size Ram.
1989
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| Author: | 65 dartman [ Tue Apr 06, 2010 5:46 pm ] |
| Post subject: | |
Thanks for the info. So it shouldn't be too terribly difficult to install one (assuming I can find one of those adapters). The rear end currently in the truck is an 8.25. I haven't determined what the ratio is yet but I figure most trucks came with either a 3.21 or 3.55. I guess either would be about optimum for use with an overdrive. |
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| Author: | Joshie225 [ Tue Apr 06, 2010 5:54 pm ] |
| Post subject: | |
Those transmissions have a .7:1 overdrive. I wouldn't run anything numerically lower in a /6 pickup than 3.21 overall. You need the torque multiplication to push through the air and climb any kind of grade. You'd need to run 4.30:1 gears to get an overall 3.0:1 in OD. Cars can use numerically lower gears due to the lower aero drag and lower weight. Most V8 OD Dodges have 3.55 to 4.10 gears. A 225 is working with less torque and therefore needs more torque multiplication. |
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| Author: | DusterIdiot [ Tue Apr 06, 2010 9:54 pm ] |
| Post subject: | Yep... |
I had a 92 Ramcharger with the mechanical Tranny (I think 93-94 is the cut off where the PROM does the "thinking"). Even with the 5.2...3.55 and OD was not the best match, I think 3.91's and it would be happier...slant six and 4.11/4.56 is looking much better... -D.Idiot |
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