1988 re gear

[Mv7fd]

I've got 235 75 r15's on my ranger and it is sluggish it has 3.45 gears should I re gear to 3.75's or is it not worth it it's got a 2.9 with a 5 speed and it was sluggish before the bigger tires

 

[Schnot]

3.73's would be better. I have a matches set for sale if you're close to pa I'd sell them cheap rather than scrapping it.


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[Schnot]

Matched set of 3.73 axles I mean. The ones that I just took out of my truck.


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[adsm08]

3.73 would be better than 3.45, but 4.10 would be better still.

 

[SenorNoob]

Agreed.^ Seems they're just as common too. Or at least ppl here make it seem that way. I need to look in the yards myself.....

 

[Mv7fd]

I was thinking about 3.73's because it's my daily driver and I run the highway about 50 miles a day but will 4.10's effect my mpg?

 

[adsm08]

Here, figure out what you want.

http://www.therangerstation.com/tech_library/gearandtirechart.html


2.9 is happiest around 25 to 2700 RPM.

 

[Mv7fd]

I think something other than the tires is killing the truck it just seems so powerless even before the bigger tires but my mpg's aren't going down I'm wondering if the double cats from the factory are plugged up

 

[adsm08]

You can always unbolt the cat and see if it drives any better. If you unbolt the cats and it improves you def have an exhaust restriction. It should run like @$$ with the cats unbolted.

 

[Mv7fd]

So with no cats it'll run bad? And i don't know what else it could be I just did a complete tune up and it was sluggish before that and now it's just starting to go more down hill

 

[adsm08]

No, with a big hole right at the end of the Y-pipe it will run bad. If you punch the cats out it will seem to run better, but I managed to lose about 2 MPG that way.

Then my O2 sensor went bad, it back fired in the empty shell, which apparently wasn't designed to withstand a small bomb going off inside it, and the resulting effective end of my exhaust system at the end of the Y-pipe made it run awful unless I was trying to accelerate. At idle or cruise it would try to stall.

 

[Mv7fd]

If I removed the cat and they are bad id run a pipe out and put a muffler on it. Would that throw any codes or effect the way the truck ran

 

[88SXT]

it may or may not throw emissions codes, im i bit rusty on OBD-I systems, i know OBD-II systems will throw bad readings from the downstream o2 sensors and the fuel trim will be off, but iirc, my 88 only has an upstream sensor so i dont think it would effect too much code wise