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I have an 85 with the 4+3. I'm getting an off throttle vibration in 3rd gear. The stick will violently start shaking like it's coming out of gear. As soon as I touch the gas it goes away. Shifting is smooth and no grinding. I had the transmission out, and when I put it back in, I used a...

I am rebuilding my 1985 C4 L98 143k miles. No prior valve work done on it and it ran great before disassembly. I need some advice on Valve seat / Valve work. The intake valves appear to be in good shape. Very minor imperfections on the valve contact area that are only apparent under a...

This is my first engine top end rebuild, so I'm trying to be careful and think everything through. Here is a barrage of questions. The Crane tech recommended Crane Gold Race Extruded Rocker Arms 1.6 11759-16, I have rod guides in the heads, plus Crane Valve Spring and Retainer Kits 11308-1 to...

I measured the friction disk in my 1985 4+3 and it is .282 thick. Does anyone know what the OEM thickness is? It doesn't seem like it has a lot of material left on it. I'm wondering if I should look into getting a new friction disk before I put everything back together. Thanks

I have a 1985 with the Z51 option. I have the suspension disassembled and was thinking of changing the shim position to lower the car about 3/4". The rear seems simple, just move the shims from top to bottom and you're done. I read that you can just remove the front shims. Does anyone here...

I have my diff apart to change all the seals, the RTV seal was leaking, original seal. I'd like to make sure I don't have to disassemble again, so I'd like to do the cover seal right. should I go with RTV or a gasket? I see "Fel-Pro RDS 55475 Rear Axle/Differential Seal" online that looks...

Hi, I have my transmission out, and the rubber cover on the 3 shift rods going through the tunnel is rotted. I don't know what this part is called, but it looks like a piece of rubber with 3 rubber fingers for the rods. Is there an online parts diagram I can use to find this or any other...

Hi everyone, I recently acquired a 1985 4+3 that, you guessed it, needs work. I was disassembling the drivetrain, when I noticed that there was a washer floating on the transmission bottom, visible through the manual transmission drain hole. I removed it through the side cover. It's...