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What did you do with your GMT400 today...or yesterday....

Have not heard from the mechanic who’s installing transmission and transfer case plus changing engine and transmission mounts. Wondering if that is good or bad? Asked my wife to stop in and check on progress on her daily walks, but she won’t. I will see him on Wednesday.
 
Got the ‘99 Suburban back after replacing the transmission and transfer case and they run sweet.

Also replaced the engine and transmission mounts with Energy Suspension black urethane mounts. Old ones were shot:

621BDCE4-FD34-404A-8223-22AA9F4441EA.jpeg

Much quieter in the cab with minimal vibration.

The new AC Delco encoder motor did not work at all and will have to be returned. He installed the old encoder motor and all but 4Lo works like before.

The aftermarket cast aluminum pan did not fit this transmission, so it got the OEM pan.

Cut and flared the transmission cooler lines to fit this transmission.

Replaced the lines for the power steering pump which were leaking, particularly the one to the steering box.

So I’m down to the oil leak on the passenger side valve cover and I have a new valve cover. Just need to order The Right Stuff gasket sealer.
 
Big T said:
Got the ‘99 Suburban back after replacing the transmission and transfer case and they run sweet.

Also replaced the engine and transmission mounts with Energy Suspension black urethane mounts. Old ones were shot:

View attachment 73286

Much quieter in the cab with minimal vibration.

The new AC Delco encoder motor did not work at all and will have to be returned. He installed the old encoder motor and all but 4Lo works like before.

The aftermarket cast aluminum pan did not fit this transmission, so it got the OEM pan.

Cut and flared the transmission cooler lines to fit this transmission.

Replaced the lines for the power steering pump which were leaking, particularly the one to the steering box.

So I’m down to the oil leak on the passenger side valve cover and I have a new valve cover. Just need to order The Right Stuff gasket sealer.
Click to expand...
Parts store should have one of those in a smaller cheeze whiz type of dispenser.
Be good for two valve covers and some left over.
 
Well I got my truck back Tuesday evening. got the speedo calibrated using another thread here along with some reading info on other sites. all went well.

I had the guy install the original locker that was in the truck with the new 3.73 gears. he told me they use a synthetic oil in all of their rear ends and have great results so I said go for it.

what's wired is yesterday and today driving around town I noticed a strange very brief vibration when starting from a stop and turning at the same time. it's done it several times, makes no noise at all and seems to glide down the road just fine. according to my RPO codes it shows G80 for rear positraction limited slip. is this a normal thing to feel a light brief vibration like this? The truck doesn't do it every time. I can say that cruising through town at 30-35 mph the engine is at 1100 rpm and won't slow down unless I press the brake! seems to do this at little to no effort as if it's floating down the road. this I like :)

Reading online about which ones need the LS additive and which don't, I am finding conflicting information. looking on another forum they are saying the G80 code does not need this additive, also not sure if that is the cause or if I'm just over thinking it!! I tend to do that a lot!!
 
dbrannon79 said:
Well I got my truck back Tuesday evening. got the speedo calibrated using another thread here along with some reading info on other sites. all went well.

I had the guy install the original locker that was in the truck with the new 3.73 gears. he told me they use a synthetic oil in all of their rear ends and have great results so I said go for it.

what's wired is yesterday and today driving around town I noticed a strange very brief vibration when starting from a stop and turning at the same time. it's done it several times, makes no noise at all and seems to glide down the road just fine. according to my RPO codes it shows G80 for rear positraction limited slip. is this a normal thing to feel a light brief vibration like this? The truck doesn't do it every time. I can say that cruising through town at 30-35 mph the engine is at 1100 rpm and won't slow down unless I press the brake! seems to do this at little to no effort as if it's floating down the road. this I like :)

Reading online about which ones need the LS additive and which don't, I am finding conflicting information. looking on another forum they are saying the G80 code does not need this additive, also not sure if that is the cause or if I'm just over thinking it!! I tend to do that a lot!!
Click to expand...

I found that Mobil synthetic gear oil eliminated this.
 
That vibration and or any noises is caused from the clutch packs slipping so it dont tear everything up.
It will get smoother over time.
My son and I installed new bearing and clutches in his old Dodge diff. Made a special tool to compress the clutches the get the spider gear pin pushed through. Talk about funnnnn. 🤷‍♂️😹😹😹
 
He did tell me to recheck the level in a few days just in case. As he had gone through the hub bearings too. I have him go through and check all the wheel bearings while he was in there
 
dbrannon79 said:
He did tell me to recheck the level in a few days just in case. As he had gone through the hub bearings too. I have him go through and check all the wheel bearings while he was in there
Click to expand...
Whenever I have hubs/bearings apart on a full floater diff. When filling it with oil, I would always fill to the level plug hole, place my thumb over the lower portion of the hole then fill it on up until oil would flow out over my thumb. Stick the plug to it loosely, jack up one side quite high, let it set for about ten or fifteen minitz, let that side down, check the fluid level, refill as before and stick in tje plug, jack the other side quite high and let it set about the same amount of time, let it down and recheck the fluid level, if ot is slightly low, fill it back up with the thumb over the lower portion of the hole until oil flows out over the top of the thumb, shove in the plug and tighten it up. Go for a drive, back into the shop and recheck the oil level, top it up, or, let it drain down, whichever it takes to het the oil level correct.
On the big trucks I would go through about the same procedure, before going for a test drive I would take the truck to the back yard and park on a slope so one side of the truck would be a lot higher than the other side, let it set like that for about a half an hour, turn the truck around and repeat. Take the truck back into the shop and recheck the fluid level, it it was a little over full I would leave it at that, take the truck for the customary road test, about 30 miles, back into the shop and recheck all fluid levels, top them up as necessary. I never did loose an axle bearing with this method, I had seen, over the years, several axle bearings burn up from lack of lube, the differentials had been filled but the lube had not got out into the bearings before highway speeds had been reached.
 
I usually do somewhat the same when I do them. I have no idea how they did it, assuming they checked it after that did a break in procedure. I had asked him on the new gears if there was a break in time to change oil or something. he told me they do a break in where once filled with oil they run it in drive on stands to 20 minutes and then in reverse for the same. then recheck oil levels.

he did tell me they were going to go through the locker and make sure it was good before installing. maybe since they had it open it's now a little tighter as to why I'm feeling the on a turn. I'll double check oil level this weekend too, but all n all it seems to glide smooth
 
Pfft. Altitude? Here's altitude! 14,130' at the parking lot, 14,265' at the summit. First picture, taken August 2017, is the marker at the parking lot, the next a photo in the parking lot looking up to the summit and the last atop the summit of Mt. Evans looking back down at the parking lot. This trip up was in my '05 Camry LE. The previous (six years before) was in my '98 6.5 Burb, rolling coal all the way up, saw a D-Max in the lot, talked to the owner, it didn't smoke hardly at all on the way up - combination of VGT and computer-controlled DI. First trip up driving was in 2006 in the G20 conversion van with the stout 327 I built. 20170814_123311.jpg20170814_122530.jpg20170814_124816.jpg
 
Husker6.5 said:
Pfft. Altitude? Here's altitude! 14,130' at the parking lot, 14,265' at the summit. First picture, taken August 2017, is the marker at the parking lot, the next a photo in the parking lot looking up to the summit and the last atop the summit of Mt. Evans looking back down at the parking lot. This trip up was in my '05 Camry LE. The previous (six years before) was in my '98 6.5 Burb, rolling coal all the way up, saw a D-Max in the lot, talked to the owner, it didn't smoke hardly at all on the way up - combination of VGT and computer-controlled DI. First trip up driving was in 2006 in the G20 conversion van with the stout 327 I built. View attachment 73351View attachment 73352View attachment 73353
Click to expand...

Been there in 2011. Scrambled up to the summit marker.
 
We weren't talking about climbing, we were talking about driving at altitude. As far a climbing altitude goes, I have a couple of good friends who beat you by nearly a mile in elevation, 19,341' at the summit, when they ascended Mt. Kilimanjaro a couple of months ago. One, Anna Wishart, is my State Senator and we've been friends for over a decade. The other, State Senator Tom Brewer, is a retired Army Special Forces Colonel who earned a Silver Star (should have been a Congressional Medal of Honor) and another Purple Heart when ambushed by a platoon-sized element of Taliban as his Team was on a recon patrol. Pinned down and shot six times, he managed to maneuver to higher ground, engage and kill several Taliban and keep them so occupied that the rest of the Team was able to maneuver to cover, then provide covering fire for him to maneuver back to them and then all of them retrograde back to base camp. He medically retired shortly after that (five years ago at age 58!) and returned back home to Nebraska, underwent a couple more surgeries for his wounds and did about six months rehab here in Lincoln at Nationally renowned Madonna Rehabilitation Hospital where my best friend since childhood was on of the Doctors of Physical Therapy who helped him in his post-surgical rehabilitation. Tom and I have known each other since we were young Infantry Second Lieutenants shortly after we Commissioned way back in the day.
journalstar.com

Nebraska senators reach the summit of Mount Kilimanjaro

"Summit," read a one-word text message from Sen. Tom Brewer of Gordon that was received in Lincoln at 12:16 a.m. Wednesday.
journalstar.com journalstar.com
 
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