My lexus v8 FB build

85turbo12a · 02-13-2013, 04:59 PM

trust me dude..i want to go..but it seems there are powerful forces at work trying to stop me...
first i get hit, then i get an odd and as of yet unidentified noise from the engine following being hit, and now i have a major driveline geometry problem that i didnt catch.

however it seems to me that the brunt of the issue lies in my grannies 8.8, the problem was probably there before when i put about 600 or so miles on it with the rotary shortly after DGRR2011 when i installed it, but was probably so borderline that it went largely unnoticed, it did have a previous high speed vibration, but not till around 130+, so i could have blamed it on many things never figuring the driveline would have a problem, since i ordered the rear to fit my application and parts, but NOW that i have changed things a little with this engine the problem has surfaced big time. the transmission is approximately 4 inches further back, and somewhere around 1.5in lower down. not a huge difference, but its non negotiable.

annoyingly i dont have a stock FB to measure on, BUT my trans is essentially pretty level in the car, and really it cannot move in any direction for any amount of worth while distance, but with that, the pinion gear is less then 1 inch below the tailshaft, BUT the issue is...the pinion points approx 3-4deg NORTH of parrallel, which is exactly opposite of where it needs to point...so its somewhere around 6-8deg off.
now i have but a few weeks and zero dollars to basically refabricate the rear end geometry and hope it solves it enough for my driveshaft to work, otherwise i will have to engineer and build a subframe in the middle of the car to house a carrier bearing for a 2 piece driveshaft assembly...not cheap, and not fun....

so with the damage from the impact along with it..im bout to call it a day and lick my wounds for a while

***TitaniumTT*** · 02-13-2013, 05:43 PM

Believe me man, I totally get the whole tuck the car away and lick some wounds and focus on shit that can get done in a timely fashion to actually enjoy the event.... hence the 8 going and not the FC....

As to geometry problems that have arisen, I don't know anything about the grannies 8.8 swap, is it a live axle or is it some type of IRS? If it's a live axle, what the Jeep guys have been doing for years is getting shims, basically little wedges that mount between the perce and the leaf springs to angle the pinion either up or down to get the proper angle for the pinion.... I'm wondering if that can be accomplished with the your setup.... although, now that I'm picturing the underside of an FB, which happens to be in the air behind me, that wouldn't be a very feasible option... one would need to cut off every single mounting tab and spring perch, rotate around the tube to where it needs to be and reweld everything.... that just sounds alot of fun.... in a sadistic kind of way.

I don't know if a carrier bearing and a 2-piece driveshaft would be the cheapest option either, the most fun for sure..., I'm thinking a double cardon driveshaft might solve the problem... and I can tell you I just paid $188 for mine for my Jeep.... and yeah.... 6-8* is way too much, they usually want to see 2-4*

I dunno.... any good pics of the grannies 8.8 you could point me too?

85turbo12a · 02-13-2013, 06:47 PM

well the coil spring and 4link set up in the FB will require me to cut and reweld the bracketry and spring buckets to solve the problem, i have a local driveline guru coming to the house this weekend to put a second set of eyes on it, no matter how much i know and do i always respect an experienced opinion as im no expert, i learn by trial and error like everyone else

but i will still try for DGRR, though im not going to reserve my room if you know what i mean, hopefully they will send me my shirts in the mail if i dont make it hehehe

not sure i will have the paint fixed either...we shall see....

85turbo12a · 02-13-2013, 11:25 PM

a carefull look that i obviously failed to give it when i installed it will reveal the problem as i am seeing it, the car/trans are near as makes no difference level, and the rear is jacked up to all but ride height minus maybe 3/4" that the springs would let me get without lifting the car, this is an unaltered as ordered, bolt in grannies 8.8 rear end, and as i am seeing it, and the digi protractor i borrowed yesterday told me, the pinion is like 4 degrees UP instead of 1-3 degrees DOWN, it is as far as i can tell, totally wrong. and lowering the transmission for the 1uz install exacerbated the problem to the point it was noticed immediately

02-13-2013, 05:43 PM	#2
*TitaniumTT* Test Whore - Admin Join Date: Mar 2008 Location: Right Behind you son Posts: 4,581 Rep Power: 10	Believe me man, I totally get the whole tuck the car away and lick some wounds and focus on shit that can get done in a timely fashion to actually enjoy the event.... hence the 8 going and not the FC.... As to geometry problems that have arisen, I don't know anything about the grannies 8.8 swap, is it a live axle or is it some type of IRS? If it's a live axle, what the Jeep guys have been doing for years is getting shims, basically little wedges that mount between the perce and the leaf springs to angle the pinion either up or down to get the proper angle for the pinion.... I'm wondering if that can be accomplished with the your setup.... although, now that I'm picturing the underside of an FB, which happens to be in the air behind me, that wouldn't be a very feasible option... one would need to cut off every single mounting tab and spring perch, rotate around the tube to where it needs to be and reweld everything.... that just sounds alot of fun.... in a sadistic kind of way. I don't know if a carrier bearing and a 2-piece driveshaft would be the cheapest option either, the most fun for sure..., I'm thinking a double cardon driveshaft might solve the problem... and I can tell you I just paid $188 for mine for my Jeep.... and yeah.... 6-8* is way too much, they usually want to see 2-4* I dunno.... any good pics of the grannies 8.8 you could point me too? __________________ -The Angry Stig- DGRR 2009, 2011, 2012 & 2013 - Best FC DEALS GAP!! WOOHOOOO!!!!! 2015 Audi S4 - Samantha - Zero Brap S4 2004 RX8 - Jocelyn - 196rwhp, 19mpg fuel to noise converter 2000 Jeep Cherokee Sport - Wifey mobile - Now with 2.5" OME lift and 30" BFG AT KO's! So it begins 1998 Jeep Cherokee - 5 spd, 4" lift, 33" BFG's - Rotary Tow Vehicle 1988 'Vert - In progress 1988 FC Coupe - Gretchen -The attention whore BEAST! I'm a sick individual, what's wrong with you? I'm pure Evil I'm still insane, in the best possible way. I think Brian's idea of romance is using lube. Your rage caused the meteor strike in Russia. The Antichrist would be proud of his minion. You win with your thread. Most everything It's a truck with a steel gate on the back. Just a statement of fact Motec M820, AIM dash, ported 13B-RE Cosmo, 6-spd trans, 4.3 Torsen, custom twin wg fully divided mani, Custom 4" split into 2x 3" exhaust, Custom HMIC, Custom custom custom custom I like to welder stuff.... No Bolt-ons allowed. Dyno'ed @ Speed1 Tuned by me - 405rwhp on WG.... WM50 cuming soon. *-Angry Motherfcker Mode ENGAGED-**

02-13-2013, 04:59 PM	#1
85turbo12a nerd Join Date: May 2011 Location: Lakeland Florida Posts: 107 Rep Power: 15	trust me dude..i want to go..but it seems there are powerful forces at work trying to stop me... first i get hit, then i get an odd and as of yet unidentified noise from the engine following being hit, and now i have a major driveline geometry problem that i didnt catch. however it seems to me that the brunt of the issue lies in my grannies 8.8, the problem was probably there before when i put about 600 or so miles on it with the rotary shortly after DGRR2011 when i installed it, but was probably so borderline that it went largely unnoticed, it did have a previous high speed vibration, but not till around 130+, so i could have blamed it on many things never figuring the driveline would have a problem, since i ordered the rear to fit my application and parts, but NOW that i have changed things a little with this engine the problem has surfaced big time. the transmission is approximately 4 inches further back, and somewhere around 1.5in lower down. not a huge difference, but its non negotiable. annoyingly i dont have a stock FB to measure on, BUT my trans is essentially pretty level in the car, and really it cannot move in any direction for any amount of worth while distance, but with that, the pinion gear is less then 1 inch below the tailshaft, BUT the issue is...the pinion points approx 3-4deg NORTH of parrallel, which is exactly opposite of where it needs to point...so its somewhere around 6-8deg off. now i have but a few weeks and zero dollars to basically refabricate the rear end geometry and hope it solves it enough for my driveshaft to work, otherwise i will have to engineer and build a subframe in the middle of the car to house a carrier bearing for a 2 piece driveshaft assembly...not cheap, and not fun.... so with the damage from the impact along with it..im bout to call it a day and lick my wounds for a while

02-13-2013, 06:47 PM	#3
85turbo12a nerd Join Date: May 2011 Location: Lakeland Florida Posts: 107 Rep Power: 15	well the coil spring and 4link set up in the FB will require me to cut and reweld the bracketry and spring buckets to solve the problem, i have a local driveline guru coming to the house this weekend to put a second set of eyes on it, no matter how much i know and do i always respect an experienced opinion as im no expert, i learn by trial and error like everyone else but i will still try for DGRR, though im not going to reserve my room if you know what i mean, hopefully they will send me my shirts in the mail if i dont make it hehehe not sure i will have the paint fixed either...we shall see....

02-13-2013, 11:25 PM	#4
85turbo12a nerd Join Date: May 2011 Location: Lakeland Florida Posts: 107 Rep Power: 15	a carefull look that i obviously failed to give it when i installed it will reveal the problem as i am seeing it, the car/trans are near as makes no difference level, and the rear is jacked up to all but ride height minus maybe 3/4" that the springs would let me get without lifting the car, this is an unaltered as ordered, bolt in grannies 8.8 rear end, and as i am seeing it, and the digi protractor i borrowed yesterday told me, the pinion is like 4 degrees UP instead of 1-3 degrees DOWN, it is as far as i can tell, totally wrong. and lowering the transmission for the 1uz install exacerbated the problem to the point it was noticed immediately