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G30 5.8l - Oil leak
#756681 February 07th 2020 10:18 am
Joined: May 2012
Posts: 251
phils Offline OP
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I've noticed an oil drip where the prop-shaft goes into the transmission. I've got a bucket under it collecting this and it does look like engine oil (black) and not trans oil (red) is this even possible? She was half empty of engine oil after sitting for a few months but not sure if this is misleading me. Would appreciate advice before i order parts etc

Attached Files tempsnip.png
Last edited by phils; February 07th 2020 10:20 am.

1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


[Linked Image]
Re: G30 5.8l - Oil leak
phils #756687 February 07th 2020 2:05 pm
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If it's leaking at the tailshaft, it's definitely transmission fluid.

Most times that gasket goes bad, it's due to the tailshaft bushing going bad, in turn allowing the seal to get more abuse and go bad as well.

I'm getting ready to do one on a TH350 and I'll do a write up when I get to it.

This is what the kit looks like for the TH350, usually costs around $35 USD for the kit around here.

[Linked Image]


[Linked Image from live.staticflickr.com]
Re: G30 5.8l - Oil leak
phils #756691 February 07th 2020 3:59 pm
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The topic says 5.8 but doesn't your van have a 454 & a 4L80E in it ?


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: G30 5.8l - Oil leak
frscke1 #756693 February 07th 2020 5:07 pm
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phils Offline OP
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Sorry yes mines is a 5.7l v8 with a 4L80e in it is it not. 94 g30 extended wheel base fescue.


1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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Re: G30 5.8l - Oil leak
phils #756695 February 07th 2020 6:57 pm
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Originally Posted by phils
Sorry yes mines is a 5.7l v8 with a 4L80e in it is it not. 94 g30 extended wheel base fescue.


Sry yours is a 7.4L a 5.7 is a 350.... long time no hear how ya doing ?


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: G30 5.8l - Oil leak
frscke1 #756773 February 11th 2020 9:30 am
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phils Offline OP
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Originally Posted by frscke1
yours is a 7.4L a 5.7 is a 350.... long time no hear how ya doing ?



really i always thought mines was 5.7, how do i tell? Ye been busy after i finished the van (almost) working on other projects. Sorted of a recent picture of mine, got sidepipes on it now.

Attached Files IMG_20180514_111927.jpg
Last edited by phils; February 11th 2020 9:33 am.

1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


[Linked Image]
Re: G30 5.8l - Oil leak
phils #756774 February 11th 2020 10:57 am
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2GAGG39N … its the N that tells


SUNSHINE VANS-VAN DIEGO
ADRENALIN BY THE GALLON & CHASIN RACIN
ONE FOR THE DIRT & ONE FOR THE STREETS
'93 CHEVY G30 454 4X4 SPORTVAN EXT 146" WB
'92 CHEVY G30 454 BEAUVILLE EXT 146" WB
Re: G30 5.8l - Oil leak
phils #756805 February 12th 2020 3:43 pm
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Sharp looking van. I like the modern wheels on there, the visor looks great too.


1987 B250 - Painkiller
Re: G30 5.8l - Oil leak
frscke1 #757507 March 04th 2020 9:22 am
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Just check, mines is def a 5.7 frsk. So what parts am I after. Still believe it's a 4L80e trans. Although I initially thought it might be engine oil. The fluid did have a very dark red colour to it.

Attached Files IMG_20200223_151139.jpg

1994 5.7l Chevy G30 LWB & 2001 Landrover Defender 90 Truck Cab


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