Hello, 91 astro with a 4.3 TBI motor. Randomly the truck will hesitate (could be for a second or over 40 seconds) and sometime stall when sitting at a light. (When stalled, it will start back up right away) Well, i did some investigating and found out that when this happens, one of the injectors sto...

I got it figured out a day after i posted this! turns out 2 of the plugs were shorter than the others, i put the old plugs in and it started up. Can't believe AC delco is giving me problems recently with there products! This is the 3rd time i've had something wrong with AC delco part :( Thanks for t...

Well, After i fixed the vibration problem, it was running pretty good. I saw one sparkplug wire was arching alittle so i brought new plugs and wires. I replaced the parts, and now this stinking truck won't start! :-k i've done plugs so many times on astro's! i've even did my head gaskets! I've check...

Well, i found out what the problem is, Turns out that one of the small tabs on the pinion yoke is worn, so the u joint is able to move abit. I welded in a peice of metal to make them the same size.... and no vibration!!!! :D So now im looking for a pinion yoke. Anyone have one for sale? or know a go...

It was the rear joint that went out.
I managed to change the springs and it lifted the truck 1.75"

The brackets were from the same truck I got the springs which were in good condition.

Sadly I still have a vibration issue :(

Thanks for all the help DYLIH

Well, recently the u joint went out on me, started to make a grinding noise. Replaced the joint and then the truck started to have a vibration at 45 kms and up and saw that the shaft had a small dent. Got another shaft and now it vibrates at 95 kms + ](*,) ](*,) What should I start looking at to see...

The van drove really smooth, then the u joint went out. I did noticed the the drivers side spring was frayed half way through, and I saw rub marks on the wheel well. The passengers side is in good condition. I managed to grab some shackles from a 2000 so I will be doing the swap tomorrow. Hopefully ...

That looks really gooooood!

Wow, that's a big difference! Hopefully you get it leveled out!

What kind of trouble are you having getting the shackle out? Not sure how/if the Gen1/Gen2 differ, but on my '03 there were two ways to get to the head of the shackle bolt. There's a slot in the "tube" that you can put an open-ended wrench into, or there was a big hole on the inside edge ...

you will find that the shackles from a fiber leaf spring are 3" wide, steel are 2.5" wide. I used 3" wide shackles and I use them on my 2.5" springs no prob, but I used a 1/4" spacer plate on each side to make up the difference. Hmm, thanks! I guess i'll have to struggle ge...

Alright, so i managed to get some steel leafs with the front mount, however the rear shackles are a :butthead: to get out. I couldnt manage to get one out, so i was looking at my van and the shackles look about the same? http://www.autoandtrucksprings.com/products/Chevy_GMC_Astro_Safari_Leaf_Spring_...

Well, I was planning on metal leafs anyways since it will make it easier to lower it ;)
I'm just hoping that is the problem! If not my van will be down longer than I'd like :(

Yepper.That would do that.I suggest while you at it,go to the pick and pull junk yard and get later model steel leafs for both sides.Make sure you get everything that is bolted to the later model Astro(front mounts etc). Z That was my plan for today, however we have a long weekend and everything is...

Thanks!

The transmission mount is in good condition!
The only thing i changed was the u joint, which gave out on the way home and made a grinding/chirping noise.

Now the only problem is a vibration at 45ish km's and up which will mostly go away when im off the gas.