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Besides one being for a non-turbo what are the main differences.

I have had an episode where the forward and direct clutches have failed at least 3 times continuously and I can't seem to find out why. Can someone point me in the right direction of what may be the cause of this failure and where I need to look. Pressures are always good 230-240ish at full TV...

Trying to chase down an issue of no knock retard. I have checked and eliminated the knock sensor itself, the ECM and the ESC module on the fender. What else could I be missing? Just FYI I checked the components by replacing them with known working parts and the knock sensor itself by banging...

As the title stated. I have no 2nd gear it shifts strait from 1st to 3rd the to OD. I don't even have 2nd gear engine braking. I see in the ATSG manual that 2nd shares the forward and overrun clutches with 1st and 3rd when applied and I have both those gears so I'm thinking it might be that the...

Hi guys, I have a 97 Blazer with a 4L60E that has a delayed 1st gear upshift and then shifts right to 3rd gear. It has no 2nd, no manual 2nd either. It does have 4th. I thought it might be the band but it has 4th and I know the band is applied in 2nd and 4th. I checked and replaced the scarf...

Looking for the correct part number for roller rockers for N1 8 bolt heads. Any help will be appreciated. Thanks, Pete

Can someone tell me what injector this is. A friend gave these to me and said he thinks they were 60 lbers. The part number is - INJ-GAS-006....... 5202Q11906.

Can you run stock push rods with GN1's or do you have to run custom length push rods?

Just CC'd my GN1 heads the newer casting an they were right at 50CC's does that sound about right? That's a pretty big chamber volume compared to the stock head.

Just trying to get an idea about what is normal. My oil pressure is good around 15-20 psi at idle after warm up and regular driving but after making a few WOT blasts it drops down to around 7-10 psi at idle and the valve trane is pretty noisey. Not tappety tap noisey but almost sounds like I...

I've been having knock issues so after checking everything else I decided check and see if my actual timing was off. Used the piston stop method and discovered that my aftermarket crank is about 10* retarded from the stock crank. No it's not the balancer as I am using the stock hub. Is this...

Fresh build and can't go past half throttle or 5psi without KR. I have check everything grounds, cam sensor setting, fuel pump. Just can't figure this one out.

What is the actual diameter and thread picth of the ARP rod bolts? Is it 7/16 x 20 or 11mm x 1.25? Looked everywhere and can not find it.

Looking for a set of 6.350 off center narrow journal rods.

Hey guys I made a major screw up. I ordered a set of custom pistons without verifying the actual rod length and ended up with a piston that's 0.147" out of the hole. I thought I had 6.350" rods when I actually had 6.500" rods. It was my screw up so I can't send them back. Can I simply stack some...

I got an opportunity to buy a set of Champion GN1 Aluminum heads. How do I identify what casting I'm looking at? Also can I use stock style T&D rockers on them? Thanks, Pete

Just want an opinion on how tight most billet caps are fit into the block. Please, only answers from those that had them machined and fitted properly. Thanks, Pete

How important is it to run aftermarket main caps on a steel crank? Since the crank flexing is the weak point is it really necessary to replace the caps when installing a steel crank or would main studs suffice? Real world info only please no preferential or hypothetical replies. Thanks, Pete

My transmission lost all forward gears on the starting line after doing my burnout on Saturday at Reynolds. I have reverse but nothing else. Upon disassembling the trans I can not remove the Forward clutch assembly from the case something appears to be holding it. Has anyone run into this...

I have a set of 0.30 stock replacement Venolia forged pistons for a production 4.1 block. These will come with the rods installed, no need to pay the machine shop just drop in. These should yield 8.0-8.5:1 compression with stock or Felpro 1000 gasket. 425.00 shipped to the lower 48. Add 3%...