looking at a 89 w/a 5spd. havent seen truck yet . owner doesnt know ratio. he says truck does a 100mph easy. its bone stock. ive heard rumor some had the 3:08 ratio like the auto trucks in 89-90. is this true? hoping its 3:54 or 4:10. any info appreciated.

 

3.54 will get you to 100mph my ex father inlaw has a 92 bone stock and it will hit 100

 

Mine won't.

 

Mine topped out at 93 mph bone stock.

 

Someone on here supposedly has one, but I think it was a factory special order. So I would say they exist, but are rare.

 

Philp

 

My 92 would hit 100 with 3.55 gears and 5 speed no problem. You'd be better off if it did not have the Dana 61. You are stuck with that ratio if it is.

 

Papcat has an 89 with 3.07s and a 5 spd but he did the 5 spd swap

 

Like said, The 3.55 will hit 100mph with the 366 spring. I have proof from a timeslip at the dragway.

 

o.k thanks. im hoping its a 60. dealt with 61 ,s before. i ,m pretty sure all 5spds had 60,s

 

My '93 5 speed with 3.54's would only go 89, and that was hard in the governor. Advanced the timing fuel, 100.

 

I had an 90 for a while that had 3.08s and the 5sp. It was a special order for the guy who bought it new and it was 4x4 3/4ton SRW.

 

Same here.

Its not a bad setup. Little spacey between gears but cranks out great mileage.

 

You could special order 3.07's with a 5 speed.

 

There is 3.54 and 4.10's available for the 61.


Im prolly gonna go that route when I get a 47rh