Race truck 4653

[Provience]

Bummer. Looks like he broke something on the qualifying course.

dang! I keep trying to get it to load and all I got was a still image of this truck on the inner short course.

 

[Roc Doc]

dang! I keep trying to get it to load and all I got was a still image of this truck on the inner short course.

The feed is dead right now. He got up to the slabs and was giving it the beans and then backed out and DNF'd.
He's got plenty of time to get it fixed before race day, but he'll have to start at the back.

 

[chaplinfj60]

anyone know what happened? was watching and saw same thing DNF

 

[Provience]

made a good bit of footage for the intermission highlight reel

now go buy T Shirts! 4653 to the MOOOOOON!!!!

 

[Pitbullcruiser]

Broken rear ring gear. We have a new ring and pinion being delivered to the lakebed tomorrow. No other issues to report.

 

[TRINDU]

Rear?

 

['84 Bronco II]

I am not super familiar with Toyota stuff, but it really didn't look like you were beating on it that hard

If it makes you feel any better, 4604 was the only rig that made a clean qualifying run of the three 4600 cars that made it through the whole course.

 

[DutchVDub]

And thats why I'm putting a 9" in mine. Good luck getting it repaired and in the main event.

 

[Cryptictoy]

Was watching and thought there is no way he broke on those little bounces. Wasn't there a discussion on here or the old place on spools allowing deflection? There really isn't any meat to that thing, vs a locker or even a stock carrier.

 

[TiTRD]

Was watching and thought there is no way he broke on those little bounces. Wasn't there a discussion on here or the old place on spools allowing deflection? There really isn't any meat to that thing, vs a locker or even a stock carrier.

I've broken quite a few 8" R&P. If you smack the pinion hard enough, it'll deflect and take out the teeth like above. Likely what happened.

 

[Roc Doc]

I've broken quite a few 8" R&P. If you smack the pinion hard enough, it'll deflect and take out the teeth like above. Likely what happened.

I broke one front (ARB) and one rear (spool), and then went to cryo'd gears and a full case Detroit and no more breakage...but that wasn't racing usage.

 

[Provience]

I broke one front (ARB) and one rear (spool), and then went to cryo'd gears and a full case Detroit and no more breakage...but that wasn't racing usage.

I broke my cryo'd rear (stock noodle housing), but that was enough to bend the spool and then broke the next gearset a bit easier on it

of course, my wife did say "you should back off before something breaks" about 30 seconds before I gave it a few more humps and popped it

 

[YotaAtieToo]

Was watching and thought there is no way he broke on those little bounces. Wasn't there a discussion on here or the old place on spools allowing deflection? There really isn't any meat to that thing, vs a locker or even a stock carrier.

I've heard that also, makes sense.

Too bad someone doesn't make a spool with more beef to it, I've seen them for other axles.

 

[Provience]

I've heard that also, makes sense.

Too bad someone doesn't make a spool with more beef to it, I've seen them for other axles.

yeah, but then the cost would go up and might as well go Detroit/grizzley/ziplocker/arb or orb of traction a factory unit at that point.

V6 with the bigger bearings or 8.4 with the bigger bearings and bearing girdle are nice, but how much work are you willing to do? on the one hand, i'm bummed I never finished my 8" braced through rear cover stock housing modifications, on the other hand, going to a 9.5" is probably the better deal, on the 3rd hand, a 14 bolt would have been the smart move

 

[SLOWPOKE693]

yeah, but then the cost would go up and might as well go Detroit/grizzley/ziplocker/arb or orb of traction a factory unit at that point.

V6 with the bigger bearings or 8.4 with the bigger bearings and bearing girdle are nice, but how much work are you willing to do? on the one hand, i'm bummed I never finished my 8" braced through rear cover stock housing modifications, on the other hand, going to a 9.5" is probably the better deal, on the 3rd hand, a 14 bolt would have been the smart move

Would the price really go up though? If the spools start out as a hunk of aluminum and are machined into the part all it would take to make it beefier would be less machining. I think the reason those Toyota spools are so tiny is because they are meant for circle track setups not offroad. Legends style circle track cars run spooled Yota rear axles and probably where the spools came from.

 

[Provience]

Would the price really go up though? If the spools start out as a hunk of aluminum and are machined into the part all it would take to make it beefier would be less machining. I think the reason those Toyota spools are so tiny is because they are meant for circle track setups not offroad. Legends style circle track cars run spooled Yota rear axles and probably where the spools came from.

yeah the common spools are cheap indian steel, AL would make them noncompetitive and increasing the size to make AL rigid enough would quickly eat into available case/housing space quickly.

making new molds would be the pricey part and there isn't much machine work done to them.

 

[SLOWPOKE693]

Durp...... I meant steel.

 

[YotaAtieToo]

Would the price really go up though? If the spools start out as a hunk of aluminum and are machined into the part all it would take to make it beefier would be less machining. I think the reason those Toyota spools are so tiny is because they are meant for circle track setups not offroad. Legends style circle track cars run spooled Yota rear axles and probably where the spools came from.

Definitely not aluminum ​​​​​​

Like prov said, I believe they're forged. So probably just the ring gear mounting surface, bearing surface and splines are machined.

I would think there is a market for an HD spool, as long as it wasn't as expensive as a Detroit/grizzly. Maybe TG is listening.

 

[Cryptictoy]

Just going back and looking at the pic ,and if your a redneck engineer, keyboard engineer, or a legit engineer. The gear set is a suck /push scenario and like link suspension there is not enough triangulation. You can take all the the super metals on earth and it still won't make a damn bit of sense to have a ring gear mounted and have no bone to back it up. My 2 cents is a stock carrier has more ability to fight deflection because of design (flat out more material from ID of ring gear to edge of carrier bearing ) that spool just went along with those few bounces and let loose .

 

[Provience]

so you bounced pretty hard on the jump landing the other day, any chance you've been able to get time for some quick sock tuning Pitbullcruiser now that the diff is back in?

 

[Provience]

Sometimes it is easier to check your gears from the outside, not during a race normally, but whatever!

 

[YotaAtieToo]

Was that from landing hard on the driveshaft?

Time for high pinion

 

[Provience]

Was that from landing hard on the driveshaft?

Time for high pinion

wouldn't it be a bitch and a half if going to the nice front housing moved the pinion back just a hair and that was just enough to have the Dshaft donkey punch the case? that'd suck

 

[KrustyTJ]

That sucks I was only able to watch the race a few minutes at a time being at work and all did this happen on the first lap

 

[Arickvan]

Sometimes it is easier to check your gears from the outside, not during a race normally, but whatever!

 

[Pitbullcruiser]

2021 KOH recap.

First event was qualifying. We broke the rear ring gear while trying to bounce up the second rock ledge. I was able to drive the truck back to the garage and start working. Yukon gear was able to get us an 8" 4.88 ring and pinion and install kit the next morning. The guys at Yukon set up the new gears for free on the lakebed and we got it back in the truck.

Next was dropping off the shocks at FOX for a free tune. I showed the tech a bunch of videos and he said he would adjust the compression. While the shocks were out my team added nitrogen to the air bumps, bringing them up to 120 psi. These two suspension changes made a huge improvements in the trucks performance and handling in the desert.

Race day we got staged and lined up. 5, 4, 3, 2, 1, go!!!! We were off the line with no issues headed to the desert. We were cruising along when we lost engine power. We climbed out to discovered a jack mounting tab broke off. This caused the jack to bounce around and took out and EFI power wire. We got that fixed, secured the jack and got back on the road.

No other issues coming into Pit 1A. We left the pit headed back out. The next spot was Cougar Buttes. At one spot the red Bronco was broke with two rigs lined up behind him. We went around them and past the Bronco. At this time the temp started to spike blow coolant out of the over flow. We got out and let it cool down, added some coolant and got back at it. We almost flopped but were able to make it through and back into the desert.

Through the desert we were keeping a good pace and the truck was handling great in the woops. Temp was good, oil pressure was good, voltage was good, we were right on track with the GPS just cruising along a wooped out section and BANG! BANG, BANG, BANG, BANG! I stopped the truck and got out. I thought it was the front driveshaft. While I was getting out I smelled oil. I thought the front driveshaft took out the oil pan. Then I got out and saw it was gear oil coming from the tcase skid. Then my codriver got out and said "holy shit, the tcase blew up". We radioed U4 operations and let then know we were out of the race. We removed the front driveshaft and drove to the road. Our chase truck from pit 1 was able to make it to our location and assist us in getting back to Hammertown. LOL, That's the fucking way she goes.

Overall it was a great trip and great race. The Truck and team were way better prepared and setup than last year. Big thanks to Matt, Mark, Austin and Elvis from Texas for all the help and looking forward to seeing you guys next year.

 

[mobil1syn]

so did you break gears in the tcase or did the dshaft break the case?

 

[Pitbullcruiser]

so did you break gears in the tcase or did the dshaft break the case?

I think it was the new axle housing and driveshaft plus the 30 year old tcase housing. I ran the same driveshaft last year bottoming out with no shocks for a few hours with no breakage. Lesson learned, measure dummy.

 

[Provience]

good to hear it was doing better in the desert!

weird that it was running hot though for a bit time for a serious radiator flush?

I can dig around, I MIGHT have a t-case housing in my garage in a box if I didn't scrap it out last year

hopefully this year you can get in a longer shock tuning session.

also i'm just going to laugh a little bit at the EFI giving you an issue that was supposed to be an improvement for this year

 

[mobil1syn]

I think it was the new axle housing and driveshaft plus the 30 year old tcase housing. I ran the same driveshaft last year bottoming out with no shocks for a few hours with no breakage. Lesson learned, measure dummy.

time for an atlas, front dig FTW