Made a dumb mistake today
 

I had been looking for another rear end for my truck to convert it from 6 to 5 lug. I already have some rims that I want to use so I started measuring how I wanted the wheels and tires to sit in the fenderwells. I found a guy selling a late model z28 rear end with posi and disc brakes that just happened to be the width I was looking for. I got the rear end home and started to stick my rims on it and they dont fit. I didnt think to check the bolt pattern. I just assumed that chevy 5 lug were all the same. My rims are 5x4.75 and these are 5x4.5. UGH!!!

Re: Made a dumb mistake today
 

wheels spacers

Re: Made a dumb mistake today
 

actually your wheels should be 5x5 and the rear end should be 5x4.75 ;)
but either way, adapters or getting the axles and rotors redrilled to the pattern you need will work

Re: Made a dumb mistake today
 

The wheels are 5x4.75 and the new rear end is 5x4.5. I cant do adapters because they will widen the rear end too much. I think I am going to just have the axles redrilled.

Re: Made a dumb mistake today
 

All older Chevy trucks are 5x5. Most GM cars have the 5x4.75, except I know the 91 and newer Caprices and Impalas are 5x5 also.

Re: Made a dumb mistake today
 

Just buy new rotors.

Re: Made a dumb mistake today
 

I agree with the others, truck 5 lug wheels are 5x5, Z28 rear ends are 5x4.75.

Re: Made a dumb mistake today
 

here you go.... since a lot of people dont know how to measure bolt patterns properly here is a pic of how to do it :)
Attachment 806563

Re: Made a dumb mistake today
 

That makes sense. Either way I still have to redrill the axles or change out the axles.

Re: Made a dumb mistake today
 

5x4.5 is ford and mopar usually. I agree, redrill and save the purchase. :lol:

Re: Made a dumb mistake today
 

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To be safe take a wheel with you when you take the axles to be drilled and let them measure it...

LockDoc

Re: Made a dumb mistake today
 

Or sell the wheels and get the ones that will fit.

Re: Made a dumb mistake today
 

we have all learned that one Car's different But Vans trucks suburbans panels and i've even seen some caddy's use the big bolt pattern

Re: Made a dumb mistake today
 

2nd all of that...redrill. crazyL

Re: Made a dumb mistake today
 

Not to mention that z28 rear end is a 7.5" 10 bolt. These are very week rears and I would not trucst one in a truck, if you plan to do more than just cruise.

Re: Made a dumb mistake today
 

Actually Caprices etc. bounced around on size from '71 up, some years had both sizes. I have had a '72 Grandville, '77 Bonneville, and '96 Caprice with the 5x5 and I had an '86 and an '88 Caprice with the 5x4.75. In the words of Shawn Spencer from the TV show Psych "I've seen it both ways".

Re: Made a dumb mistake today
 

I just ordered a set of wheel adapters for my neighbor yesterday. Chevy S10 with 5x4.75 to 5x5;)

just make sure you get the reach nuts to go with it and you wont have a problem. "IF" you have enough room at the fender...you might have to roll the fenders

Re: Made a dumb mistake today
 

I've been measuring the 5 lugs wrong! I always take a rim though. I've screwed up enough times with centers being too small or the pattern being smaller or bigger that I always take a rim.