2000 4.8 to muncie... what flywheel
07-07-2012, 02:09 PM
#1
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2000 4.8 to muncie... what flywheel Im so lost here. I am lloking to mount a Muncie to my 4.8 and need a flywheel but have no idea what to get. I have heard that the 2000 4.8 is different than other years but not sure. ive looked through threads and cant find anything for the 2000. any help here would be great.
07-07-2012, 04:48 PM
#3
Some early LS truck engines had a .400" longer crank section at the rear main.
If you have the extra depth of the "4L80-E" crank, run the 1050 and you might get by with the small pilot bearing in the crank. If you have the standard LS crank style, you might need to go with the LS7 large o.d. pilot bearing that sits further out in the crank. Either way, careful measuring and exploring all options (there's a Corvair bushing that comes out further yet than the LS7 bearing.) so the input is properly supported is critical.
Stolen from: http://67-72chevytrucks.com/vboard/s...d.php?t=466250 "LS" crank depth:
Extended "4L80-E LS" crank depth:
The 4.3 flywheels do not interchange with the LS_ stuff.
If you have the extra depth of the "4L80-E" crank, run the 1050 and you might get by with the small pilot bearing in the crank. If you have the standard LS crank style, you might need to go with the LS7 large o.d. pilot bearing that sits further out in the crank. Either way, careful measuring and exploring all options (there's a Corvair bushing that comes out further yet than the LS7 bearing.) so the input is properly supported is critical.
Stolen from: http://67-72chevytrucks.com/vboard/s...d.php?t=466250 "LS" crank depth:
Extended "4L80-E LS" crank depth:
The 4.3 flywheels do not interchange with the LS_ stuff.
07-07-2012, 11:01 PM
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So either way the 1050 will work I just need to get the appropriate bearing depending on my crank. Also I my first post the 4.3 was a typo I meant 4.8. Thanks for the help.
07-10-2012, 02:17 AM
#5
The longer crank only applies to early 6.0's with the 4l80e. 4.8 never had the 4l80e behind it so that is irrelevant.
Your going to need a flywheel from a late 80's truck with a sm465. From what I understand, the bolt holes are close but will require some massaging. Pressure plate from the 465 and the a disc with the proper spline count for the muncie input shaft...obviously the same diameter as the Pressure plate.
Your going to need a flywheel from a late 80's truck with a sm465. From what I understand, the bolt holes are close but will require some massaging. Pressure plate from the 465 and the a disc with the proper spline count for the muncie input shaft...obviously the same diameter as the Pressure plate.
07-10-2012, 06:42 AM
#7
jmd has good pics of the long and short crank. If you have the short one, you should be good to go with the 1050 flywheel.
I know the standard 10spline BBC 11" clutch fits in a 621 bellhousing, I'm not sure if the bigger 11 1/2" truck clutch (SM465) will fit.
I know the standard 10spline BBC 11" clutch fits in a 621 bellhousing, I'm not sure if the bigger 11 1/2" truck clutch (SM465) will fit.
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07-10-2012, 07:57 AM
#9
Not so sure about that. I'm running an 11" BBC clutch/sachs 1050 flywheel in a 621 bell. That extra 0.4" crank length might cause interference between the pressure plate and bell housing. Not a lot of room in there.
The sachs flywheel for the LQ motors is thicker than the standard LS1 flywheel making things tighter.
The sachs flywheel for the LQ motors is thicker than the standard LS1 flywheel making things tighter.
07-10-2012, 12:48 PM
#11
Not so sure about that. I'm running an 11" BBC clutch/sachs 1050 flywheel in a 621 bell. That extra 0.4" crank length might cause interference between the pressure plate and bell housing. Not a lot of room in there.
The sachs flywheel for the LQ motors is thicker than the standard LS1 flywheel making things tighter.
The sachs flywheel for the LQ motors is thicker than the standard LS1 flywheel making things tighter.
05-17-2013, 05:01 PM
#14
So would a LS1 flywheel & clutch work on a Muncie with a 26 spline shaft?
I read somewhere that a LS1 clutch a 26 spline pressure plate.
If so a LS1 flywheel + LS7 pilot bearing + LS1 Clutch + Howes hydro TOB to M20?
A stock LS1 TOB won't fit?
I read somewhere that a LS1 clutch a 26 spline pressure plate.
If so a LS1 flywheel + LS7 pilot bearing + LS1 Clutch + Howes hydro TOB to M20?
A stock LS1 TOB won't fit?
05-17-2013, 07:54 PM
#15
Exactly what I have in front of my Jerico 4 speed. I don't have a pic of the t/o bearing but it's #82870 and test-fit OK. I got a SPEC stage 3 clutch and a Fidenza aluminum flywheel off E-Bay (in fact, everything but the gearbox was from E-Bay) along with a BBC scattershield and Hurst Super Shifter...
05-18-2013, 04:39 AM
#16
05-18-2013, 10:26 AM
#17
Exactly what I have in front of my Jerico 4 speed. I don't have a pic of the t/o bearing but it's #82870 and test-fit OK. I got a SPEC stage 3 clutch and a Fidenza aluminum flywheel off E-Bay (in fact, everything but the gearbox was from E-Bay) along with a BBC scattershield and Hurst Super Shifter...
Now this is a Great Answer, by the grace of God u found this thread to give us the 411 we need.
Thank u so much!!!!
LS1 Flywheel+LS1 Clutch+Howes Part#82870+LS7 Pilor Bearing= Success!!
What Kinda gear u running with your Jericho? Tire hight?
05-20-2013, 07:44 PM
#19
I am on a 32.4" tire & with 3.42 gears n a M20 in the making..
wont be the fastest thing, but should hold up better than original NV3500....
Has anyone ever tried the Stock LS1 TOB?
wont be the fastest thing, but should hold up better than original NV3500....
Has anyone ever tried the Stock LS1 TOB?
