Dana 20 t/case on th350 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

bamaK5 · 04-29-2002, 10:51 PM

Was this combo ever available, or has anyone done it? I want an automatic and I have a good Dana 20 t/case if this is a possible swap. The t/case is mated to a 3 speed now. Thanks in advance guys.

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1971 K5 Blazer 307 3sp/205(project)

*Fast68Chevy* · 04-29-2002, 11:40 PM

not according to 67-72 GM specs, dana 20 only with 250 engine only

cant say about other years though, may have been then, who knows

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Randy- Lincoln, IL
randy@ccaonline.com 2177353230
-71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not)
-84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,,
-84 Firebird SE 2.8L T-5, rod knocking, dammit,,
-82 Firebird 350 4bolt (TBL)/TH350, not running, dammit...
buy/sell/hoard/trade most any GM vehicle parts of any kind
-parting out: '81 Cutlass Supreme Brougham
*Paint is overrated
© RSS Enterprises 2000

[This message has been edited by Fast68Chevy (edited April 29, 2002).]

Blazer1970 · 04-30-2002, 06:40 AM

I am pretty sure some Blazers came that way, maybe '69 only? I recall someone on the old Wulf's Blazer Den board saying they had that combo. The factory manual for 1970 makes it sound like all Blazers came with Dana 20s that year, but I am sure some '70s came with NP205s. At any rate, it would be a Blazer since that was the only place GM ever used a Dana 20 case. None in pickup trucks, ever. On edit, I just looked at the '70 Blazer brochure, and it shows the NP205 as standard with the TH350, so it would be '69 only, or I am losing my mind, which is possible also. At any rate, you would never be able to find an adapter for your swap, so you need to just find an NP205!

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Tim

[This message has been edited by Blazer1970 (edited April 30, 2002).]

JJR · 04-30-2002, 08:40 AM

I played on Hollanders and found the following applications for the Dana 20:
BLAZER/JIMMY (full size) 71-72 M.T., 3 spd.
BLAZER/JIMMY (full size) 73-75 M.T., 3 spd., w/Saginaw
CHEVROLET PICKUP TRUCK 73-75 M.T., 3 spd., w/Saginaw
GMC PICKUP TRUCK 73-75 M.T., 3 spd., w/Saginaw
SUBURBAN 73-75 M.T., 3 spd., Saginaw

I could not find a Dana 20 in a 3-speed (Muncie), 4-speed or auto trans truck.

Blazer1970 · 04-30-2002, 11:29 AM

I know for a fact that they made Blazers with SM465s and Dana 20s. I have seen this combo on quite a few first gen Blazers.

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Tim

OLDCHEV4X4 · 04-30-2002, 07:33 PM

I inquired about this last year and also came up empty handed. The dana 20's are nice and light and would make a good combo with a t-350 trans, but i dont think they can hold up to a 350 motor. I wanted to put one in the 'Dirt Draggin Blazer' because of the weight savings. Correct me if i'm wrong but i think the dana 20 only came with a manual 3 speed with a 6 cyl or a 307 engine. Dana 20's cant take the abuse.
Check Advanced Adaptors
Randy

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72 k/10 short wideside
72 k/5 Blazer
72 custom/10 8' bed
69 c/10 8' bed
71 k/5......rusty!! IT WENT TO THE SCRAP YARD
72 custom/10 short stepside
70 C-30 Longhorn, its Longhornmail's now.
70 K-5 Blazer
chester county pennsylvania

04-29-2002, 10:51 PM	#1
bamaK5 Registered User Join Date: Mar 2002 Location: Jasper, AL USA Posts: 19	Dana 20 t/case on th350 Was this combo ever available, or has anyone done it? I want an automatic and I have a good Dana 20 t/case if this is a possible swap. The t/case is mated to a 3 speed now. Thanks in advance guys. ------------------ 1971 K5 Blazer 307 3sp/205(project) __________________ 1971 K5 Blazer 307 3sp/205(project)

04-30-2002, 06:40 AM	#3
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,507	I am pretty sure some Blazers came that way, maybe '69 only? I recall someone on the old Wulf's Blazer Den board saying they had that combo. The factory manual for 1970 makes it sound like all Blazers came with Dana 20s that year, but I am sure some '70s came with NP205s. At any rate, it would be a Blazer since that was the only place GM ever used a Dana 20 case. None in pickup trucks, ever. On edit, I just looked at the '70 Blazer brochure, and it shows the NP205 as standard with the TH350, so it would be '69 only, or I am losing my mind, which is possible also. At any rate, you would never be able to find an adapter for your swap, so you need to just find an NP205! ------------------ Tim [This message has been edited by Blazer1970 (edited April 30, 2002).] __________________ Tim

04-30-2002, 08:40 AM	#4
JJR Registered User Join Date: Apr 2000 Location: Leesburg, GA Posts: 746	I played on Hollanders and found the following applications for the Dana 20: BLAZER/JIMMY (full size) 71-72 M.T., 3 spd. BLAZER/JIMMY (full size) 73-75 M.T., 3 spd., w/Saginaw CHEVROLET PICKUP TRUCK 73-75 M.T., 3 spd., w/Saginaw GMC PICKUP TRUCK 73-75 M.T., 3 spd., w/Saginaw SUBURBAN 73-75 M.T., 3 spd., Saginaw I could not find a Dana 20 in a 3-speed (Muncie), 4-speed or auto trans truck. __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Second Owner 70 C-10 Second Owner 93 GMC C1500 Third Owner 99 C2500 Crew Cab Short Bed

04-30-2002, 11:29 AM	#5
Blazer1970 Registered User Join Date: Dec 1999 Location: Old Mission, MI, USA Posts: 2,507	I know for a fact that they made Blazers with SM465s and Dana 20s. I have seen this combo on quite a few first gen Blazers. ------------------ Tim __________________ Tim

04-30-2002, 07:33 PM	#6
OLDCHEV4X4 Registered User Join Date: Apr 2000 Location: Chester County PA, USA Posts: 1,228	I inquired about this last year and also came up empty handed. The dana 20's are nice and light and would make a good combo with a t-350 trans, but i dont think they can hold up to a 350 motor. I wanted to put one in the 'Dirt Draggin Blazer' because of the weight savings. Correct me if i'm wrong but i think the dana 20 only came with a manual 3 speed with a 6 cyl or a 307 engine. Dana 20's cant take the abuse. Check Advanced Adaptors Randy ------------------ 72 k/10 short wideside 72 k/5 Blazer 72 custom/10 8' bed 69 c/10 8' bed 71 k/5......rusty!! IT WENT TO THE SCRAP YARD 72 custom/10 short stepside 70 C-30 Longhorn, its Longhornmail's now. 70 K-5 Blazer chester county pennsylvania __________________ 72 k/10 short wideside 72 k/5 Blazer 72 K/5 Blazer - obstacle course racer 72 custom/10 8' bed 70 K/5 Blazer 67 C-30 GMC Flat bed 86 GMC K2500 Plow Truck 85 GMC K3500 84 M1008 85 M1008 77 G30 Motor Home 72 Sears 12hp Tractor Glenmoore, Pennsylvania

04-29-2002, 11:40 PM	#2
Fast68Chevy Account Suspended Join Date: May 2000 Location: IL Posts: 0	not according to 67-72 GM specs, dana 20 only with 250 engine only cant say about other years though, may have been then, who knows ------------------ Randy- Lincoln, IL randy@ccaonline.com 2177353230 -71 C-10 350/CH465/3.07, assemble it, yeah right, that'll happen in this world,(not) -84 Z28 Camaro 5.0L 700R4, 3.73, beater, paid way too much for it like an idiot,, -84 Firebird SE 2.8L T-5, rod knocking, dammit,, -82 Firebird 350 4bolt (TBL)/TH350, not running, dammit... buy/sell/hoard/trade most any GM vehicle parts of any kind -parting out: '81 Cutlass Supreme Brougham *Paint is overrated © RSS Enterprises 2000 [This message has been edited by Fast68Chevy (edited April 29, 2002).]



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