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Muncie m21 yoke question

May 29, 2023, 08:17:36 PM by Swampyankee74
Views: 13 | Comments: 0

I have a muncie m21 with a 31 spline output shaft. I'm trying too match up a yoke for this. Getting a little confused while hunting out the right part. I see yokes for 32 spline muncie but not 31. A 31 spline output would have 32 spline on the yoke, but the way they have it worded sounds like they are talking about the shaft being 32 spline not the yoke. Has anyone been through this? Worst comes to worse I order the part and return if it doesn't fit. Just thought someone might bring some clarity on this.

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1985 C10 power lock not working on drivers side

May 29, 2023, 12:43:25 PM by crsmith56 | Views: 27 | Comments: 0

First time posting. My 85 C10 has always had the issue of power locks not working on driver side. However, the switch on the driver side will lock and unlock the passenger side. The passenger side only operates passenger side. I replaced the actuator on driver side and no luck. My suspicion is broken wire going into the cab through the rubber sleeve?

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89 TBI 350 Rough Surging Idle, Cutting Out/Stumbling on Acceleration

May 28, 2023, 04:30:00 PM by Dr_Snooz | Views: 57 | Comments: 1

Hi everyone. It's been a while, but I'm back with my 89 Suburban. I'm dealing with an intermittent stumbling/cutting-out issue lately. This morning the truck drove great with only a few light stumbles, on light acceleration, as I went to church. Coming home, it had a rough, surging idle on startup, and a lot of stumbles all the way home. Sometimes the idle would dip low briefly, then recover as I came to a stop. By "stumbles," I mean momentary losses of power for a second or two before recovering. It hasn't died yet, but I'm sure that's coming.

I've been through a few troubleshooting charts listed in the factory manual without finding anything wrong. The charts don't inspire confidence, though. For example, if you hit 9-13 psi within 2 seconds of turning the key on, then the fuel pump is deemed good and you can look elsewhere for your problem. ?

I've replaced the distributor with a new NAPA unit. The wires are a couple months old. O2 sensor is a new Bosch. Plugs were inspected and gapped 3 months ago. Fuel pressure tested at 12 psi per above. Fuel pump was replaced with an AC Delco unit in 2015, and has very few miles on it. Injectors are new rebuilt units from Standard Motor. Alternator output is 14.7V at idle. Timing is 0 with the brown wire unplugged. TPS is new. EGR tests out okay per the manual. Spark at idle is strong (hard to check it at speed.) Fuel filter is new. There seems to be a small vac leak at the booster check valve. I'll fix it tomorrow. No ECM codes. Battery cables are new homemade jobs that greatly improved my starter speed.

I can't find any threads or weblinks that cover my specific issue. I'm open to suggestions.

Thanks

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83 Lost crank and signals

May 27, 2023, 06:54:53 AM by slideways | Views: 70 | Comments: 3

So I'm getting closer to being done restoring this K10 swb 350. I had the cab off and on during the process but didn't touch the column or fuse block. When reassembling it I had no signals at one point and other weird taillight issues and realized I didn't have the body grounded back in the taillight harness. Put all that together and put both new flashers in. Now I had everything working. The truck always cranked and fired perfect through the process. I secured the harness to the frame rail with retainers the other day and last night went to operate everything. I suddenly have no crank, no horn, no flashers or signals. I have park lamps,brake, and reverse lamps. I don't see any burn marks on the fusible links by the starter but I'm not familiar with them. I have good ground at the alternator, the frame next to the fuel pump, the firewall, the bed/taillight area. I think the only other ground is by the fuel tank which is also connected. Fuses look fine.
I'm trying to figure out what's related here that would cause this all of the sudden. Ignition switch? Ground I don't know about?

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Manual brakes to power brakes

May 23, 2023, 04:02:42 PM by Swampyankee74
Views: 97 | Comments: 5

I'm converting my 74 c15 from manual to power brakes. I purchased a remained Delco moraine vacuum booster supposedly for this year tuck. My manual brakes bolted flat to the break/steering bracket with a rubber grommets where it went through the fire wall. The new vacuum booster stands off on brackets. What seals around the brake pushrod where it goes through the firewall? Am I missing a part? Looking at something wrong?

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