Pharisaism, if I'm not mistaken, was largely restricted to Jerusalem and the larger towns of Judea. Thus, in Galilee where Jesus lived and started gathering his initial following, the Pharisees may not have had all that much of a 'base'.
As such, I think its to be expected that Jesus's understanding of Torah would not align entirely with the Sages (Pharisees), inasmuch as he was Galilean and not Judean.
I would distinguish two things here, if I may: '
doctrine' from '
halakot' (behaviour). As E.P. Meier notes: "
Debate between Jesus and the Pharisees tended to be of a halakic (legal, behavioral) rather than of a doctrinal nature. Such debate probably involved questions like divorce, fasting, tithing, purity rules, observance of the sabbath, and in general the relative importance of various external observances" (p.339)
'Doctrinally': Jesus's own theology was pretty close to that of the rabbis out of the myriad of Second Temple sects. I mean, Jesus
was clearly antithetical to the thought of the Sadducees - and his teachings in this regard are pretty indistinguishable from Pharisaism.
Jesus acknowledges the Pharisees’ Torah knowledge and authority as keepers of authentic Oral Torah, the ancestral tradition of the fathers: "
The scribes and the Pharisees sit on Moses’ seat; 3 therefore, do whatever they teach you and follow it"
(Matthew 23:1-3) (cf. Pesiq. Rav Kah. 1.7).
In m. Sanhedrin 10:1, the Mishna excludes from a share in the
Olam Haba any Jew who claims there is no resurrection of the dead: "
One who maintains that resurrection is not a biblical doctrine, the Torah was not divinely revealed, and a heretic.”
Josephus informs is that the Pharisees, in contradiction to the Sadducees, had a belief in the immortality of the soul, a place of reward and punishment after death, and the resurrection of the body (2.8.14 §163). Jesus agreed on each one of those points of cardinal 'doctrine' that distinguished the sages from other contemporaneous sects of Judaism at that time.
Thus, Jesus defends the resurrection of the dead in dispute with the Sadducees: "
18 Some Sadducees, who say there is no resurrection, came to him and asked him a question, saying, 19 “Teacher, Moses wrote for us that if a man’s brother dies, leaving a wife but no child, the man shall marry the widow and raise up children for his brother. 20 There were seven brothers; the first married and, when he died, left no children; 21 and the second married the widow and died, leaving no children; and the third likewise; 22 none of the seven left children. Last of all the woman herself died. 23 In the resurrection whose wife will she be? For the seven had married her.”
24 Jesus said to them, “Is not this the reason you are wrong, that you know neither the scriptures nor the power of God? 25 For when they rise from the dead, they neither marry nor are given in marriage, but are like angels in heaven. 26 And as for the dead being raised, have you not read in the book of Moses, in the story about the bush, how God said to him, ‘I am the God of Abraham, the God of Isaac, and the God of Jacob’? 27 He is God not of the dead, but of the living; you are quite wrong.” (
Mark 12:18-27).
He upholds a belief in the post-mortem survival of the soul: "
Do not fear those who kill the body but are unable to kill the soul" (
Matthew 10:28) and believed in an interim place of punishment or reward after death in Sheol or Hades, as is suggested in his parable about the poor beggar Lazarus: "
The time came when the beggar died and the angels carried him to Abraham's side. The rich man also died and was buried. In Hades, where he was in torment, he looked up and saw Abraham far away, with Lazarus by his side" (
Luke 16:22-23)
In terms of 'halakot', however, this is where Jesus engaged in a good bit of dispute with the sages.
As an eschatological prophet, for example, Jesus came down very strongly against divorce. We all know about the consternation over this between the House of Hillel and the House of Shammai but Jesus' own position was based on an interpretation of Genesis which held that the Creator's intention from the beginning had been the permanent union of man and woman in marriage (
Mark 10:1-12).
He rejected voluntary fasting:
"
Then the disciples of John came to Him, saying, "Why do we and the Pharisees fast often, but Your disciples do not fast?" And Jesus said to them, "Are the sons of the bridechamber able to mourn while the bridegroom is with them? But the days will come when the bridegroom shall be taken away from them, and then they shall fast."
(
Matthew 9:14-15)
And he also neglected or possibly rejected familial obligations and purity rules. In
Mark 7:14, 18-23 Jesus says, “
There is nothing outside a person that by going in can defile, but the things that come out are what defile...Nothing that enters a man from the outside can defile him, because it does not enter his heart, but it goes into the stomach and then is eliminated....What comes out of a man, that is what defiles him. For from within the hearts of men come evil thoughts...All these evils come from within, and these are what defile a man".
Luke's gospel and St. Paul (decades before Mark) attested to different, independent variations of this same teaching (making it one of the most authoritative and ancient Jesus sayings by multiple attestation):
"
Now you Pharisees clean the outside of the cup and of the dish, but inside you are full of greed and wickedness. You fools! Did not the one who made the outside make the inside also? Instead, give for alms those things that are within; and see! everything will be clean for you" (Luke 14:39-41)
St. Paul appeared to know of this Jesus tradition as well, prior to the writing of the canonical gospels: "
I know and am persuaded in the Lord Jesus that nothing is unclean in itself; but it is unclean for anyone who thinks it unclean" (
Romans 14:14)