How To: Dropping the front differental after TB crank (MMP) - Page 3 - Chevy Colorado & GMC Canyon
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post #41 of 318 (permalink) Old 07-15-2007, 05:19 PM Thread Starter
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Re: driveline angle

Quote:
Originally Posted by towley250
arent you concerned about the drive line angle?seems to me if you go much farther than 1/2"drop you risk making you front driveline angle too steep which can cause severe vibrations in 4wd
Well I'll see if it causes vibrations. This is why I am testing out. If it's a problem it seems like we could use less of a rear spacer for the bracket, putting less of an angle on the drive line. Any input is accepted and thats why we ask for it. As always please remember to read our disclaimer.

Disclaimer: "Please use caution and seek professional assistance when necessary. ColoradoFans.com, myself and all associated members are not responsible for any damages, injuries or other harm which may occur with this modification. This post does not reflect the views of ColoradoFans.com and it's ownership." Before attempting this modification, it is advised to verify with your Colorado or Canyon service manual or a certified mechanic, as not all GMT 355's are the same!

'06 Crew Silverado 4.8L 3.73 4WD G80 Granite Blue Metallic

'08 EC 3.7 Auto 3.73 4WD G80 Granite Black Metallic - Traded for 2006 Silvy

'05 EC, I5M, Z71, 4wd 4.10 gears, G80, SB Orange, 1.5" AAL, 1.5" TB lift, Lifted Club #115 - traded for 2008

'76 CJ5, 304 V8, 3spd, rebuild in progress.

AAL Install - CV Stress Relief

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post #42 of 318 (permalink) Old 07-15-2007, 09:03 PM
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Thanks for the torque spec of 112 lbs. I previously tightened real tight with my ratchet, but when I went back to torque it I only had it at about 80 lbs. Now 112 and ready to 4 by.

I think the Cap screw would work great. The M14 2.0 120mm 8.8 bolts I saw only had about 1.5" of threads. I didn't want to use them cause they were only 8.8s, but 1.5" of thread doesn't leave much room for adjustment.

'05 Colorado Z71 Crew 4X4 Auto I5
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post #43 of 318 (permalink) Old 07-16-2007, 12:30 AM Thread Starter
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We'll let you know how they work once they are made and have been on for a while. I am going to an offroad park August 12th, so that'll be a real test.

I would suggest everyone pick up a Haynes manual, they have the torque specs for most stuff, or at least ranges for the different sizes.

'06 Crew Silverado 4.8L 3.73 4WD G80 Granite Blue Metallic

'08 EC 3.7 Auto 3.73 4WD G80 Granite Black Metallic - Traded for 2006 Silvy

'05 EC, I5M, Z71, 4wd 4.10 gears, G80, SB Orange, 1.5" AAL, 1.5" TB lift, Lifted Club #115 - traded for 2008

'76 CJ5, 304 V8, 3spd, rebuild in progress.

AAL Install - CV Stress Relief

RIP Spike 9-25-2007
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post #44 of 318 (permalink) Old 07-16-2007, 12:58 PM
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post #45 of 318 (permalink) Old 07-16-2007, 01:25 PM Thread Starter
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What about the hardened washers needed for the bolts? I can always pick those up here if need be.

'06 Crew Silverado 4.8L 3.73 4WD G80 Granite Blue Metallic

'08 EC 3.7 Auto 3.73 4WD G80 Granite Black Metallic - Traded for 2006 Silvy

'05 EC, I5M, Z71, 4wd 4.10 gears, G80, SB Orange, 1.5" AAL, 1.5" TB lift, Lifted Club #115 - traded for 2008

'76 CJ5, 304 V8, 3spd, rebuild in progress.

AAL Install - CV Stress Relief

RIP Spike 9-25-2007
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post #46 of 318 (permalink) Old 07-16-2007, 02:55 PM
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Harden washer would be to bridal so we'll stick with the common soft washer to lock the bolt head.
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post #47 of 318 (permalink) Old 07-16-2007, 03:56 PM Thread Starter
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ok good enough

'06 Crew Silverado 4.8L 3.73 4WD G80 Granite Blue Metallic

'08 EC 3.7 Auto 3.73 4WD G80 Granite Black Metallic - Traded for 2006 Silvy

'05 EC, I5M, Z71, 4wd 4.10 gears, G80, SB Orange, 1.5" AAL, 1.5" TB lift, Lifted Club #115 - traded for 2008

'76 CJ5, 304 V8, 3spd, rebuild in progress.

AAL Install - CV Stress Relief

RIP Spike 9-25-2007
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post #48 of 318 (permalink) Old 07-18-2007, 01:34 AM
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Ok I have the M14-130mm bolts.
Waiting for the 14mm washers and I will work on the 1" spacers this weekend!
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post #49 of 318 (permalink) Old 07-19-2007, 07:24 PM
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OK done with the 1 inch spacers plus I have the M14-130MM bolts and 14mm washers instock.

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post #50 of 318 (permalink) Old 07-19-2007, 07:35 PM Thread Starter
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cools looks good. Is that washer big enough? I dont remember the hole size on the bracket.

'06 Crew Silverado 4.8L 3.73 4WD G80 Granite Blue Metallic

'08 EC 3.7 Auto 3.73 4WD G80 Granite Black Metallic - Traded for 2006 Silvy

'05 EC, I5M, Z71, 4wd 4.10 gears, G80, SB Orange, 1.5" AAL, 1.5" TB lift, Lifted Club #115 - traded for 2008

'76 CJ5, 304 V8, 3spd, rebuild in progress.

AAL Install - CV Stress Relief

RIP Spike 9-25-2007
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post #51 of 318 (permalink) Old 07-19-2007, 08:15 PM
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post #52 of 318 (permalink) Old 07-20-2007, 12:06 AM Thread Starter
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thanks

'06 Crew Silverado 4.8L 3.73 4WD G80 Granite Blue Metallic

'08 EC 3.7 Auto 3.73 4WD G80 Granite Black Metallic - Traded for 2006 Silvy

'05 EC, I5M, Z71, 4wd 4.10 gears, G80, SB Orange, 1.5" AAL, 1.5" TB lift, Lifted Club #115 - traded for 2008

'76 CJ5, 304 V8, 3spd, rebuild in progress.

AAL Install - CV Stress Relief

RIP Spike 9-25-2007
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post #53 of 318 (permalink) Old 07-20-2007, 12:56 AM
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Would you fellows hurry up so we can get some parts!!!

Haha, I can't do this mod for a few months (away from truck because of work) so I have no need to rush ya'll, but I'm anxious to get the pieces anyway!

'06 Z-71 Crew Cab -- Sold.

'12 5.3 LT2 - Wicked.
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post #54 of 318 (permalink) Old 07-20-2007, 01:05 AM
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Quote:
Originally Posted by hmmbagodden
Would you fellows hurry up so we can get some parts!!!

Haha, I can't do this mod for a few months (away from truck because of work) so I have no need to rush ya'll, but I'm anxious to get the pieces anyway!
How far of an angle is your CV's?
Have any pic?
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post #55 of 318 (permalink) Old 07-20-2007, 01:19 AM
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hey supermod...can you make .75" spacers as well...i mean some may have more angle then others...so how hard would it be for you to offer .5, .75, and 1.0...also do the "kits" come with the driver for the bolts...and is there any idea on pricing for the kits...thanks alot guys

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and much more to come as soon as i get my welder
you can see pics at the link below, click 2trackr then pics

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post #56 of 318 (permalink) Old 07-20-2007, 02:18 AM
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All good questions Rick!

The first step is coyote is going to install the first set of 1" spacers and check for axle alignment and no front shaft binding.
I will leave it up to coyote to determine the spacer selection but I have a limited amount of resources so it’s going to be a first come first serve basis.
Price not determined.
After coyote has given me the ok we will offer a limited kit.
The driver for the cap head bolts is a 12mm hex to ½
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post #57 of 318 (permalink) Old 07-20-2007, 02:41 AM
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I'd be willing to pay for a set to test the 1/2" or 3/4" ( 3/4" preferred ) drop and the skid plate clearance. Let me know.

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post #58 of 318 (permalink) Old 07-20-2007, 02:43 AM
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Supermod, I've got 1.5" crank on my TB, and I'll do a 2" if I drop the differential a 1/2" to level out the truck more after the shackles are installed (they're at home with my truck that I can't work on and it's killing me!)

(I'm deployed for a research project right now, and I won't have enough time in my few visits home before the project is done in October -- so don't rush anything, ya'll are doing the right approach with the testing. I'm just waiting to fly out to another location and anxious to see how this project moves along... sorry for the bugging!)

'06 Z-71 Crew Cab -- Sold.

'12 5.3 LT2 - Wicked.
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post #59 of 318 (permalink) Old 07-20-2007, 03:17 AM
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Quote:
Originally Posted by rangerbob
I'd be willing to pay for a set to test the 1/2" or 3/4" ( 3/4" preferred ) drop and the skid plate clearance. Let me know.
Bob - What is your TB cranked to?

You brought up a good question!
Skid plate clearance? Is yours OEM or aftermarket?


Quote:
Originally Posted by hmmbagodden
(I'm deployed for a research project right now, and I won't have enough time in my few visits home before the project is done in October -- so don't rush anything, ya'll are doing the right approach with the testing. I'm just waiting to fly out to another location and anxious to see how this project moves along... sorry for the bugging!)
May I ask what you do?
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post #60 of 318 (permalink) Old 07-20-2007, 11:23 AM
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Yea no prob Supermod, I'm working for a marine geotech firm doing Seismic surveying and we've got a survey to do in the Beaufort Sea to do this summer. It's only ice free from late July to mid-October, so we're finishing up mobilization to get the ship up and surveying right now.

Anyways, I'll be back off and on throughout the rest of the survey, but it won't be for more than a day or two, therefore not allowing me to work on the truck. But that's ok, I'll take a little time off when all this wraps up, and I've got a list of improvements I plan on doing. In the meantime, I'm just doing my research on different mods, writing up (or finding and copying) some basic directions, and ordering all the pieces needed before I get back.

Here's a brief list:
- Mount the shackles that came in just before I left.
- Drop the differential 1/2" and crank up the TBs to 2" (1.5" right now because I'm nervous about going up to 2"...)
- Order a set of bubbaloo skidplates and mount those (hence I'm interested in seeing the clearance on these skids with the drop)
- Order the lightbar seen from the NW -- the one on sneaky's truck.
- Light 'er up! I'm going to replace various different lights (inside & out) and add a few more on the front lightbar.
- And I'm thinking about replacing the transmission crossmember with something that has a lower profile.

I'm really interested in this mod, and I hope it works out -- I like the look with the TB crank, but I'm weary about the CV angle over the long run. Dropping the differential looks to be an easy modification that can really save the life of stock parts over time.

This forum is pretty cool, I admit that I know I don't know everything about trucks, I mean, I'm just out of college. But, put a mountain bike in my hands and I can tear that thing down to bits and pieces and reassemble it with no problem. So I'm good with my hands, and I have a good mechanical know-how of how stuff works, and I'm applying those knowledge and skills to building up a kick-a$$ truck... with the help of this forum.



Edit: Stupid spelling mistakes.

'06 Z-71 Crew Cab -- Sold.

'12 5.3 LT2 - Wicked.
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