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12-30-2020, 12:53 AM
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#1 |
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Registered User
 Join Date: Sep 2019
Location: Saint George
Posts: 50
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C10 5.3/Th400 Swap, engine tilted too far?
Hey guys! Im working on my 5.3/th400 install still, I noticed that it seems like it rocks back pretty far when the transmission is on the cross member mount. Is there a general angle you should have your engine and transmission sitting at? If it's too low can I shim the transmission mount up some?
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12-30-2020, 04:01 AM
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#2 |
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Registered User
Join Date: Dec 2009
Location: Independence Mo
Posts: 4,119
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Re: C10 5.3/Th400 Swap, engine tilted too far?
You can shim it up. What angle is it at right now?
__________________
My '72 short bed build. http://www.ls1tech.com/forums/conver...6-0-4l80e.html 5.3 swap into my RUSTY '71 C10 http://ls1tech.com/forums/conversion...71-c-10-a.html |
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12-30-2020, 06:52 AM
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#3 |
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Registered User
Join Date: Jul 2014
Location: North-central Virginia
Posts: 1,104
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Re: C10 5.3/Th400 Swap, engine tilted too far?
What year is the truck, and what engine mounts and trans crossmember are you using?
Pics could be handy, just in case there's something glaringly obvious. Particularly a photo of the transmission mount & crossmember.
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1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome! |
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12-30-2020, 08:05 AM
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#4 |
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Post Whore
  
Join Date: May 2015
Location: Alabama
Posts: 14,670
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Re: C10 5.3/Th400 Swap, engine tilted too far?
I try to get the angle at 3deg down at the trans end...but it needs to match numerically the up angle of the diff
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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12-30-2020, 11:42 AM
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#5 |
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Registered User
Join Date: Sep 2019
Location: Saint George
Posts: 50
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Re: C10 5.3/Th400 Swap, engine tilted too far?
I need to get a angle reader so I can find out what the exact number is. I have a 1970 c10, I'm using the stock motor mounts, ict conversion plates, and a trans adapt transmission xrossmember
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12-30-2020, 12:30 PM
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#6 | |
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Registered User
Join Date: Jul 2014
Location: North-central Virginia
Posts: 1,104
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Re: C10 5.3/Th400 Swap, engine tilted too far?
Quote:
https://www.harborfreight.com/dial-g...der-34214.html
__________________
1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome! |
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12-30-2020, 01:38 PM
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#7 | |
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Registered User
Join Date: Sep 2019
Location: Saint George
Posts: 50
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Re: C10 5.3/Th400 Swap, engine tilted too far?
Quote:
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12-30-2020, 08:02 PM
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#8 |
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Registered User
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
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Re: C10 5.3/Th400 Swap, engine tilted too far?
https://www.homedepot.com/p/Klein-To...-311131769-_-N
The digital ones are nice to use. There are cheaper than this one out there. |
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12-30-2020, 08:50 PM
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#9 |
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Post Whore
Join Date: May 2015
Location: Alabama
Posts: 14,670
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Re: C10 5.3/Th400 Swap, engine tilted too far?
I've got a assortment of digital levels that I got off ebay... and I've got several of the swing type like listed above at cardboard freight... I prefer the digitals myself..
__________________
Mongo...aka Greg RIP Dad RIP Jesse 1981 C30 LQ9 NV4500..http://67-72chevytrucks.com/vboard/s...d.php?t=753598 Mongos AD- LS3 TR6060...http://67-72chevytrucks.com/vboard/s...34#post8522334 Columbus..the 1957 IH 4x4...http://67-72chevytrucks.com/vboard/s...63#post8082563 2023 Chevy Z71..daily driver |
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12-30-2020, 09:15 PM
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#10 | |
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Registered User
Join Date: Jul 2014
Location: North-central Virginia
Posts: 1,104
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Re: C10 5.3/Th400 Swap, engine tilted too far?
Quote:
I would have some concerns with accuracy with the cheap pendulum gauges though. Another thought, is to grab a piece of angle iron, and drill a couple of holes in it so it can be bolted to the pinion yoke or to a flat surface on the trans/t-case. Print off a paper protractor, paste that onto the angle iron, and suspend a weight in front of it. The larger your printed protractor is, the better the accuracy will be. I'll either use the HF gauge or the DIY method when I set up my pinion angle. The digital ones aren't worth the cost to me for as little as I'll use it.
__________________
1987 C6P V20 truck, 2010 LMG 5.3, AFM delete, 2010 Camaro exhaust manifolds, 1997 nv4500, 1991 np241c, hydroboost, 2005 14bff axle & driveshaft, drop-n-lock gooseneck, 4.10 gears, stock suspension, rims, and tires. Still a work in progress. Any questions or suggestions are welcome! |
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12-30-2020, 10:06 PM
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#11 |
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Registered User
Join Date: Oct 2014
Location: Brandon, Manitoba, Canada
Posts: 995
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Re: C10 5.3/Th400 Swap, engine tilted too far?
The pendulum ones can be hard to read if you need get your head up in an awkward position to look straight at the dial. The digital ones you can get it set and hit the hold button and bring it out to where you can read it.
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12-30-2020, 10:38 PM
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#12 |
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Senior Member
Join Date: Jan 2009
Location: huntington beach california
Posts: 976
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Re: C10 5.3/Th400 Swap, engine tilted too far?
If you have a IPhone there is a digital level in your measure app.
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