Any way to identify an IROC box other than to know the car is an IROC?

[Vicinity]

I got a line on an Iroc box for my Camaro, but the guy isn't sure how many turns lock to lock, he sold the steering column already, he said he knows the car is a real IROC, so is their any way to identify from the box?

[67rally]

If he's still got the rag joint on it he can find dead center and turn it all the way to the left, then all the way to the right and count how many turns it takes lock to lock. It's a direct connection to the steering wheel. Two turns of the steering wheel is two turns of the rag joint. I think the IROC box is 2.25?

[Vicinity]

Yeah, 2 and a quarter.

I'll ask him if he can spin it around and count the rotations, that doesn't sound too unreasonable.

[67rally]

Yeah, 2 and a quarter.

I'll ask him if he can spin it around and count the rotations, that doesn't sound too unreasonable.

Just keep in mind that if there is no rag joint, it will be harder to spin, and harder to get an accurate count. 2.25 and 2.5 will look almost identical without a frame of reference. I suppose he could clamp a vise grip on it and spin it if worst came to worst.

[Vicinity]

Just keep in mind that if there is no rag joint, it will be harder to spin, and harder to get an accurate count. 2.25 and 2.5 will look almost identical without a frame of reference. I suppose he could clamp a vise grip on it and spin it if worst came to worst.

Out of curiosity, is 2.25 and 2.5 really that much different in the car, as far as feel goes?

Just in case, would the 2.5 really be that bad compared to a stock manual 68 box?

[67rally]

Out of curiosity, is 2.25 and 2.5 really that much different in the car, as far as feel goes?

Just in case, would the 2.5 really be that bad compared to a stock manual 68 box?

It all depends on what you want. I just swapped out a 67 manual box for a Delphi 670 box which is 2 turns lock to lock and love it. ANYTHING is better than a 67-68 manual box. It's not just about the number of turns, but also how responsive it is. That will be determined by the steering and pitman arm lengths as well.

[David Pozzi]

Best method is to place a degree wheel on the output shaft & turn the input shaft 1 turn, read degrees.
I have the degree info here: http://pozziracing.com/camaro_steering.htm#Steering%20box%20and%20ratio%2 0info

[LT1Nova]

I seem to remember looking for a Z cast into the housing on the faster ratio boxes back when I was looking for one.

[Vicinity]

It's a 2 and a 1/4! :)

Any advice for getting the old pitman arm off? 5 lbs rubber hammer didn't do a thing.

[LT1Nova]

A 2 jaw gear puller maybe or a true pitman arm puller. Lisle tools # 41900. Try searching for pitman puller on your favorite parts stores website. Sometimes they will even rent them.

[Vicinity]

A 2 jaw gear puller maybe or a true pitman arm puller. Lisle tools # 41900. Try searching for pitman puller on your favorite parts stores website. Sometimes they will even rent them.

Aw, that's a good idea. To Autozone!