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post #1 of (permalink) Old 01-06-2002, 01:13 PM Thread Starter
 
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Which auto/v8 combo for my D300?

I am thinking ahead to the next phase of my rock crawler build up. I will be going with an injected V8 and an automatic. I want to keep my D300 as I have just installed the 4:1 kit and HD output shaft. I don't want to spend money on adapters if there is a way around it. I am really auto tranny ignorant.

I am looking at the 350 or the 302. My preference is for a 302HO. (I am a Ford guy) I like the lighter weight and (H8 being correct)easier to keep cool than the Chevy 350 (Arizona summers). it really depends on what will match up.


Which autos will bolt to my D300? What tranny is best for this application?

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post #2 of (permalink) Old 01-06-2002, 01:17 PM
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Re: Which auto/v8 combo for my D300?

You wanta keep costs down and no adapters, then a AMC 360 with a 727 is the perfect combo.

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post #3 of (permalink) Old 01-06-2002, 01:58 PM
 
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Re: Which auto/v8 combo for my D300?

The C6 tranny is very tough, and would be an easy bolt up to the 5.0, but I dont know what would be involved in adapting the D300.
The 727 as Brad mentioned is legendary in terms of strength and reliability. The 350 auto is also a great choice especialy if you use an FI SBC engine. The 350 auto, or 700R4 have probably the most options for electronic lock up and shift control.

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post #4 of (permalink) Old 01-06-2002, 02:07 PM
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Re: Which auto/v8 combo for my D300?

I agree with Brad 110%.[img]/wwwthreads_images/icons/smile.gif[/img] Consider adding GM TBI fuel injection to a 360, check the following link for more information.

http://www.customefis.com/amc360kit.html

I've even posted a complete 1990 Chevy 350 TBI system in the ORC classified Electrical section[img]/wwwthreads_images/icons/smile.gif[/img]
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post #5 of (permalink) Old 01-06-2002, 02:23 PM Thread Starter
 
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Re: Which auto/v8 combo for my D300?

(edit) this was my response to Brad, It didn't post the first time.

Ok, but then I need to inject it. It is not so much that I want to keep costs down, who doesn't, I just don't want to spend money on adapters. This is what I am thinking:

I have enough money into this D300 (which is still at Teraflex by the way) that spending money for an adapter would put me into the cost range of an Atlas. Rather than buy the adapter, I would just sell my D300 and purchase the atlas. Assuming of course that the auto of choice would bolt right up to an atlas.






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post #6 of (permalink) Old 01-06-2002, 02:46 PM
 
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Re: Which auto/v8 combo for my D300?

The D300 and the Atlas II inputs are the same.
The advantage of the SBC or the 5.0 is the glut of aftermarket parts, and resulting affordability. Also the ease of locating low mileage, affordable engines, for the original swap or in the case of needing a replacement.

Jeff
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post #7 of (permalink) Old 01-06-2002, 02:58 PM Thread Starter
 
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Re: Which auto/v8 combo for my D300?

Is the electronic lockup that important. I would love it for those loose downhills. But can't I acomplish the same thing with with a low stall speed torque converter?

Actually, now that I have said that, I don't think I understand the concept of stall speed. [img]/wwwthreads_images/icons/tongue.gif[/img]



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post #8 of (permalink) Old 01-06-2002, 03:13 PM
 
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Re: Which auto/v8 combo for my D300?

A low stall speed will allow the torque converter, to lock up at low speeds. Being locked up means it wont be slipping causing excessive heating. Being locked up also means that trying to stop it at low speeds is nearly impossible. I wheeled with Troy Faber and his Sniper last weekend, he has to have additional brake boosters in the rear fender wells, just to try to stop that rig when its locked up at low speeds. By using an electronic lock up, you can run a higher stall speed, but lock up the converter electronicaly when you need to, and unlock it when you need more control on a slow climb.

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post #9 of (permalink) Old 01-06-2002, 03:39 PM
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Re: Which auto/v8 combo for my D300?

I would`nt touch that 700R4 with a 10,000 foot pole . It`s a POS . I have had my dealings with that tranny in my Z71 , and I am one who actually changes my auto tranny oil as recommended .Just start asking questions about that tranny on the Chev boards , if they are honest they will tell you to avoid it to . Out of our small shift at work 4 guys run 90`s 4x4 Chevies , everyone of them has had auto transmission failure before thier 60,000 mile service . C6 all the way !!




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post #10 of (permalink) Old 01-06-2002, 03:49 PM
 
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Re: Which auto/v8 combo for my D300?

I agree the 700R4 is a total POS. I bought brand new blazers in 83 and 85, and ended having to sue GM because of the disposable trannies. I couldnt get through any summer of towing our race boats without replacing at least 2 trannies. But there are some good high dollar versions of the 700R4 nowadays. That gives you the electronic shifting, electronic lock up, and an overdrive. It wouldnt be my 1st choice, but it is a very good set up, in the right configuration.

Jeff
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