k5 cummins blazer - Page 2

Greguw · 11-07-2009, 05:35 PM

I have built a few in the past and am now doing a 1990 suburban , Not sure if your into stick shift trucks , but as others have sugested the NV4500 is the best choice for your application .
Problem with the allison is your going to need to go with a devorced mounted transfer , you will not have enough room .
As for the transfer case , a pre 93 np 205 would be the best choice , they are a right side drop for the front shaft .
You could get away with a Getrag , the NV4500's have the mounting holes as the earllyer Getrags and will bolt to a 205 .
Onlyy thing is either setup with a 205 are selling for a preimum , I have seen just np 205 and adapter sell for 1500 , and thats not rebuilt and you still need the trans .

odee · 11-08-2009, 07:17 AM

will the cummins clear the front axle without any lift on the leafsprings?

Copasetic · 11-08-2009, 07:34 AM

I've been thinking seriously about starting to gather the parts to do this swap in my K5. I want an auto tranny though. Does anyone know the preferred year and model Allison to use?

silver98Z71 · 11-08-2009, 07:43 AM

Quote:

Originally Posted by odee

will the cummins clear the front axle without any lift on the leafsprings?

No, the oil pan will be sitting on the front axle with stock springs. The 4" lift springs will let it clear but it is still close.

Steveo87 · 11-08-2009, 09:21 AM

Quote:

Originally Posted by blownblue

Avalanch engineerings mounts look very nice and are one of the cheaper ones out there. I have hemmed and hawed about doing the swap cause I have a 6bt complete but the sm465 bellhousing is going to make it a pain imo for me as i am cheap...

You just need the adapter plate to go to a GM trans. A lot of 4BT had them. I helped my friend put a 4BT with a sm465 into a 87 1 ton 2wd chevy.

CrewCab59 · 11-08-2009, 02:11 PM

Quote:

Originally Posted by silver98Z71

No, the oil pan will be sitting on the front axle with stock springs. The 4" lift springs will let it clear but it is still close.

Yes the oil pan will clear with no lift !

leeman1790 · 11-08-2009, 02:30 PM

You done yet?

chevalade · 11-08-2009, 04:03 PM

Quote:

Originally Posted by CrewCab59

Yes the oil pan will clear with no lift !

Pics or it didn't happen!!!!

silver98Z71 · 11-08-2009, 04:28 PM

Quote:

Originally Posted by CrewCab59

Yes the oil pan will clear with no lift !

Not from what I have seen. My friend's oil pan was setting on the differential with the stock springs when he first set the motor in.

sledhead22 · 11-09-2009, 10:06 PM

It says on the kits u got to have a 4" lift. Is there any pics of the swap?

exracer3 · 11-09-2009, 11:46 PM

I did a 1987 suburban and I used 3" springs to clear. Now I am doing a k5 and I will be using 4" springs cause I will be installing a dana 60. I will know for sure if it will clear by this weekend. Exracer3

jimmer · 11-10-2009, 05:53 PM

Quote:

Originally Posted by silver98Z71

Not from what I have seen. My friend's oil pan was setting on the differential with the stock springs when he first set the motor in.

CrewCab59 is correct...there are mounts and crossmember out there that do not require a lift at all...

http://www.4btswaps.com/forum/showth...highlight=lift

silver98Z71 · 11-11-2009, 06:50 AM

Quote:

Originally Posted by jimmer

CrewCab59 is correct...there are mounts and crossmember out there that do not require a lift at all...

http://www.4btswaps.com/forum/showth...highlight=lift

Well, my colleague pointed out to me that the CrewCab59 fellow (or someone with an extremely similar screen name) offers Cummins swap motor mounts that utalize part of the GM mounts. He said if he did the swap he would modify his mounts to resemble more of the CrewCab59 mounts.

CrewCab59 · 11-12-2009, 11:29 PM

Quote:

Originally Posted by leeman1790

You done yet?

Done ton of them ,these were going to be done for the CUCV repower program. The project never took off because the Gov spending .

CrewCab59 · 11-12-2009, 11:33 PM

Quote:

Originally Posted by chevalade

Pics or it didn't happen!!!!

Here are some pics!

lumpdog · 11-13-2009, 09:06 AM

My 87 K30 has no front lift and clears the Dana 60 as well. I made my own mounts using second gen Dodge motor mounts.

chevalade · 11-15-2009, 09:31 AM

Pic 1 looks like major engine setback, and that the crank pully is resting on the x-member? Also it clears, but how much uptravel do you have? Any pics of yer "kit".

zukidave · 11-15-2009, 11:16 AM

I'm doing this right now on a 91 suburban using the
TN. DIESEL mount's and cross member with a
12 valve nv 4500/241 combo.

First off you WILL have to box the frame at least back
past the tranny cross member as it Will flex till the door's hit the fender's.

You will need to build a new front cross member as the bal. and
A/C comp will hit.
then notch and gusset the frame rail to clear the A/C comp.

It will need at least 6" of lift to clear the dana 60
and cross member with cross over steering.

CrewCab59 · 11-15-2009, 03:27 PM

Quote:

Originally Posted by zukidave

I'm doing this right now on a 91 suburban using the
TN. DIESEL mount's and cross member with a
12 valve nv 4500/241 combo.

First off you WILL have to box the frame at least back
past the tranny cross member as it Will flex till the door's hit the fender's.

You will need to build a new front cross member as the bal. and
A/C comp will hit.
then notch and gusset the frame rail to clear the A/C comp.

It will need at least 6" of lift to clear the dana 60
and cross member with cross over steering.

Boxing the frame WRONG !

The front member only needs trim the lip off for the belt ,the A/C is fine where it is with very little trim or by the Mid mount A/C bracket.

Any kind of lift will work but to say a 6'' is need to clear the D60 is wrong, it will fit with no lift . The 1st gen crossmember is needed for crossover steering , the 2ng gen is for no lift .

zukidave · 11-15-2009, 07:19 PM

Well then come by and show me how to get the front clip back on with the fender's over lapping the door's at the top.

On this burban the frame flexed enough
that the clip would not go back on till I boxed it with no weight
on the front axle.

jcbrotz · 11-15-2009, 07:47 PM

Quote:

Originally Posted by zukidave

Well then come by and show me how to get the front clip back on with the fender's over lapping the door's at the top.

On this burban the frame flexed enough
that the clip would not go back on till I boxed it with no weight
on the front axle.

Then your frame is fawrked.

You might not know where yet but you will someday, shortly after you drive it

CrewCab59 · 11-15-2009, 09:20 PM

Quote:

Originally Posted by zukidave

Well then come by and show me how to get the front clip back on with the fender's over lapping the door's at the top.

On this burban the frame flexed enough
that the clip would not go back on till I boxed it with no weight
on the front axle.

LOL ,Pay for a ticket and I will show ya how it's done , I guess you need to buy the owner a new frame!

CrewCab59 · 11-16-2009, 07:19 PM

Quote:

Originally Posted by chevalade

Pic 1 looks like major engine setback, and that the crank pully is resting on the x-member? Also it clears, but how much uptravel do you have? Any pics of yer "kit".

The engine isn't set back , it clears the firewall .No the pulley isn't touching ,it's has the rear facing lip trim off so the belt can be taken off. With no lift and depend on shape you could have from 2" to 4" or until the bump stop hits the spring plate.The link is posted.

11-08-2009, 07:34 AM	#28
Copasetic Registered User Join Date: Feb 2009 Member # 129329 Location: Martinez, GA Posts: 30	I've been thinking seriously about starting to gather the parts to do this swap in my K5. I want an auto tranny though. Does anyone know the preferred year and model Allison to use? __________________ 1990 K5 - Tons and more 1987 Sammi - Under decon/recon

11-08-2009, 02:30 PM	#32
leeman1790 WolfeFab Join Date: Apr 2008 Member # 113084 Location: Birmingham, AL Posts: 378	You done yet? __________________ Truggy...350/350/203/60/14/52's/57's/propane/hydro/tubes....465/205 soon lee

11-09-2009, 11:46 PM	#36
exracer3 Registered User Join Date: Apr 2005 Member # 45718 Location: norcal Posts: 79	k5 cummins blazer I did a 1987 suburban and I used 3" springs to clear. Now I am doing a k5 and I will be using 4" springs cause I will be installing a dana 60. I will know for sure if it will clear by this weekend. Exracer3

11-13-2009, 09:06 AM	#41
lumpdog Registered User Join Date: Mar 2005 Member # 44659 Location: Mtn Home, Idaho Posts: 710	My 87 K30 has no front lift and clears the Dana 60 as well. I made my own mounts using second gen Dodge motor mounts. __________________ 87 XJ....RIP, 88 Blazer was d60/14b, 44" TSL-now upgrading to 1/2 tons and 35's to be a DD again,

11-15-2009, 11:16 AM	#43
zukidave Registered User Join Date: Apr 2006 Member # 71711 Location: austin texas Posts: 146	I'm doing this right now on a 91 suburban using the TN. DIESEL mount's and cross member with a 12 valve nv 4500/241 combo. First off you WILL have to box the frame at least back past the tranny cross member as it Will flex till the door's hit the fender's. You will need to build a new front cross member as the bal. and A/C comp will hit. then notch and gusset the frame rail to clear the A/C comp. It will need at least 6" of lift to clear the dana 60 and cross member with cross over steering. __________________ 88sammi Waggy 44,s 538,s 5to 1 tcase yj front spring,s toy p/up rear spring,s turned backward,s saginaw power steering 36" tsl,s full cage Last edited by zukidave; 11-15-2009 at 11:29 AM.

11-07-2009, 05:35 PM	#26
Greguw Registered User Join Date: Oct 2009 Member # 145015 Posts: 7	I have built a few in the past and am now doing a 1990 suburban , Not sure if your into stick shift trucks , but as others have sugested the NV4500 is the best choice for your application . Problem with the allison is your going to need to go with a devorced mounted transfer , you will not have enough room . As for the transfer case , a pre 93 np 205 would be the best choice , they are a right side drop for the front shaft . You could get away with a Getrag , the NV4500's have the mounting holes as the earllyer Getrags and will bolt to a 205 . Onlyy thing is either setup with a 205 are selling for a preimum , I have seen just np 205 and adapter sell for 1500 , and thats not rebuilt and you still need the trans .

11-08-2009, 07:17 AM	#27
odee Registered User Join Date: Apr 2000 Member # 613 Location: Big Stone Gap, VA., USA Posts: 744	will the cummins clear the front axle without any lift on the leafsprings?

11-09-2009, 10:06 PM	#35
sledhead22 Registered User Join Date: Nov 2009 Member # 145980 Posts: 4	It says on the kits u got to have a 4" lift. Is there any pics of the swap?

11-15-2009, 09:31 AM	#42
chevalade Registered User Join Date: Aug 2009 Member # 140610 Posts: 40	Pic 1 looks like major engine setback, and that the crank pully is resting on the x-member? Also it clears, but how much uptravel do you have? Any pics of yer "kit".

11-15-2009, 07:19 PM	#45
zukidave Registered User Join Date: Apr 2006 Member # 71711 Location: austin texas Posts: 146	Well then come by and show me how to get the front clip back on with the fender's over lapping the door's at the top. On this burban the frame flexed enough that the clip would not go back on till I boxed it with no weight on the front axle. __________________ 88sammi Waggy 44,s 538,s 5to 1 tcase yj front spring,s toy p/up rear spring,s turned backward,s saginaw power steering 36" tsl,s full cage

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