D50 Tranny Question (Gear Ratios)

AbsurdParadox · Post by **AbsurdParadox** » Tue Apr 12, 2005 2:21 pm

Just been wondering, if anyone knows the actual gear ratios on the D50 tranny, or atleast those of you who've got a D50 bolted up to a StarQuest rear end, what are your current redline shift points in mph? (For example 1st to 25mph, 2nd to 60mph or whatever). Or even you D50 guys, what are they at in your truck, and whats your rear diff's ratio?

AbsurdParadox · Post by **AbsurdParadox** » Mon Apr 18, 2005 4:08 pm

Come on, someone's gotta know!

Mike · Post by **Mike** » Mon Apr 18, 2005 5:10 pm

Here you go.

Starquest Transmissions

Starquest Differentials

Early Pickup Transmissions

Early Pickup Differentials

Late Pickup Transmissions

Late Pickup Differentials

Shift points are dependent on the engine being used, e.g. a stock 2.4L would shift at 5800 RPM, a stock 2.6L would shift at 6000 RPM, and a stock 2.0L would shift at 7000 RPM.

Post by **DJpowerHaus** » Wed Apr 20, 2005 1:11 am

This is from the 88 starion manual to add to the pile (which is amazing.. where did you get all that!!)

Model KM132-M-CNL (Starion)
Type 5 speed, Floor-shift
Gear Ratio 1st 3.369
2nd 2.035
3rd 1.360
4th 1.00
5th 0.856 (overdrive)
Reverse 3.578
Speedometer gear ratio 8/23

Mike · Post by **Mike** » Wed Apr 20, 2005 2:06 pm

Let's just say I have access to certain automotive resources for free and I make liberal use of them if you need.

AbsurdParadox · Post by **AbsurdParadox** » Wed Apr 20, 2005 8:14 pm

Awesome that is EXACTLY what I was looking for!!

Yeah when I was asking about shift points, I was referring to what RPM/speed on a 2.0.

Thanks a ton guys.

Post by **DJpowerHaus** » Thu Apr 21, 2005 11:26 am

I know there is a transmission calculator that will graph your speeds and RPMs and all that good stuff based on all kinds of input. I cant afford it though. Somebody buy it and we'll all steal it from you.

Mike · Post by **Mike** » Thu Apr 21, 2005 11:50 am

This should be good enough.

<a href='http://www.geocities.com/z_design_studi ... ssion.html' target='_blank'>http://www.geocities.com/z_design_studi ... on.html</a>