Ratio adapter

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Ratio adapter

Postby Jelmer » Wed Feb 14, 2018 12:59 am

Our 93 didn't come with a ratio adapter on it when we got it so the speedo is way off.
We ordered a ratio adapter from the Transmission centre but it doesn't fit because the crossmember is in the way.

This is how it looks:


But I think it should look like this one:


Can I turn one of the lids on the ratio adapter so that it is an offset piece and will it clear the crossmember like this?
Truck is 100% stock transmission wise.
Greetings from the Netherlands where there are only 2 or 3 1stgens!
93 D250 Cummins, G360, 4" stainless exhaust, BHAF, DennyT stage 2 pin, 3200rpm governor spring, 12cm housing, rest stock.
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Re: Ratio adapter

Postby thrashingcows » Wed Feb 14, 2018 8:46 pm

I have never had one apart so can not say if there is a different orientation on the gearing inside if the top is switch positions. But worth a try since shipping on another piece is probably costly. ;)
1984/93 Dodge Crewcab, W350, 1 Ton SRW, long box, 330K Km's, M&H spacer, 366 spring, fuel pin to deep side, 14cm housing, Piston LP, PS IC, Isspro Boost, Pyro and tach, NV4500, 29 spline NP205, 3.54's.

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Re: Ratio adapter

Postby cougar » Sat Mar 03, 2018 1:12 pm

You are talking 2wd here? If so, they don't need an external adapter. All you need to do is replace the driven gear in the side of the tail shaft. In the attached picture what you have is the one on the right.
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RIP 91.5 W250 5 speed. The great experiment.
92 W250 HD 47RH with Compushift. Upgraded H1C to 62/60/16, Scheid Lightning VE, 60# valve springs, DAP 7X.010 injectors, 4" DE exhaust, home made cooler tubes.
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