New tire and tranny/dif question

[dvani]

Hope it doesn't t anyone off. I'm relatively new to the site.

Have a '90 full size Jimmy. Just went from BFG 33x10.5's to BFg 33x9.5's. My question is this.... noticed today that I have to gas it a bit more to even come off a stop and it won't even idle forward.
Could it just be the tires or am I needin to worry about the tranny or my gearing ( which I have no idea about).

Thanks for the input and for all the things I have learned so far

 

[89GMCSuburban]

Never even heard of BFG 33X9.50 tires. The 10.50 I have.

Gearing, no, cause from the looks of it, you didn't go any taller. Actually, you want with the same height and thinner tires....if those numbers are right...which has to be impossible. You sure of the tire size?

 

[74757685k5]

whats the tire differance 1'' narrower?? shouldn't make any diff.

 

[dvani]

They are 33x9.5's ta ko.... lucked into em....

what I am really worried is that it means my tranny gonna crap out. No new noises or rattles or anything but I don't know much about 'em yet.

Btw, thanks for the replies

 

[jekbrown]

how does your transmission shift? I know when mine died it had a tendancy to slip and a hard time "finding" the next gear when I was accelerating.

gears shouldnt be a problem because tire height didn't change... its probably something else. Any more symptoms you can tell us about? which trans do you have?

j

 

[dvani]

Tranny shifts as good as ever... I honestly don't know which one I have. I will crawl under tomorrow.

 

[flashman]

Maybe a really longshot, but I think you`ll get more weight pr square inch with the slimmer tires than with the broader ones - could be that you`ll need more power to get them rolling ??

(I`m out on a limb here, but at least I think the theory`s sound, I`ll stand at attention and wait for a scolding from someone more knowlegdeable, thought )

 

[dave_90_blazer]

A 90 should have a 700R4 trans and a NP241 T-case